528 lines
13 KiB
C++
528 lines
13 KiB
C++
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/*
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copyright (c) 1992 Microsoft Corporation
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Module Name:
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ddeLink.cpp
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Abstract:
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This module implements:
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DdeBindToObject
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DdeIsRunning
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Author:
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Jason Fuller (jasonful) 19-October-1992
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*/
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#include "ddeproxy.h"
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// #include <ctype.h>
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INTERNAL DdeBindToObject
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(LPCOLESTR szFileIn,
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REFCLSID clsid,
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BOOL fPackageLink,
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REFIID iid,
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LPLPVOID ppv)
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{
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intrDebugOut((DEB_ITRACE,
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"DdeBindToObject szFileIn(%ws) fPackageLink(%x)\n",
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szFileIn,
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fPackageLink));
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LPUNKNOWN punk;
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*ppv = NULL;
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CDdeObject FAR* pdde=NULL;
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HRESULT hresult = E_UNEXPECTED;
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BOOL fSysConnection = FALSE;
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WCHAR wszTmpFile [MAX_STR+5];
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//
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// This protocol doesn't handle the fact that there are two names for
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// every file. This is a bit of a problem. So, we are going to choose
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// the short name as the one to look for. This means that DDE objects
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// using the long filename will not work very well.
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//
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WCHAR szFile[MAX_PATH];
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if ((lstrlenW(szFileIn) == 0) || (GetShortPathName(szFileIn,szFile,MAX_PATH) == 0))
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{
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//
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// Unable to determine a short path for this object. Use whatever we were
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// handed.
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//
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intrDebugOut((DEB_ITRACE,"No conversion for short path. Copy szFileIn\n"));
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lstrcpyW(szFile,szFileIn);
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}
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intrDebugOut((DEB_ITRACE,"Short file szFile(%ws)\n",szFile));
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RetZS (punk=CDdeObject::Create (NULL,clsid,OT_LINK,wGlobalAddAtom(szFile),
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NULL,&pdde),E_OUTOFMEMORY);
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RetZ (pdde);
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// Document already running?
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if (NOERROR != (hresult = pdde->DocumentLevelConnect (NULL) ))
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{
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if (GetScode (hresult) != S_FALSE)
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{
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intrDebugOut((DEB_ITRACE,
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"DdeBindToObject szFile(%ws) DLC returns %x \n",
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szFile,hresult));
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goto exitRtn;
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}
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// If not already running, try to make a sys level connection
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if (!pdde->m_pSysChannel) {
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if (!pdde->AllocDdeChannel (&pdde->m_pSysChannel, SYS_CLASSA))
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{
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intrAssert( !"Out of memory");
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hresult = E_OUTOFMEMORY;
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goto exitRtn;
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}
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}
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hresult = ReportResult (0, E_UNEXPECTED, 0, 0);
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if (fPackageLink) {
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lstrcpyW (wszTmpFile, szFile);
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lstrcatW (wszTmpFile, L"/Link");
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pdde->SetTopic (wGlobalAddAtom(wszTmpFile));
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}
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if (pdde->InitSysConv())
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{
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fSysConnection = TRUE;
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// Try to make the server open the document
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ErrRtnH (pdde->PostSysCommand (pdde->m_pSysChannel, (LPSTR)&achStdOpenDocument,FALSE));
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pdde->m_fDidStdOpenDoc = TRUE;
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}
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else
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{
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// launch the server
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if (!pdde->LaunchApp())
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{
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hresult = CO_E_APPNOTFOUND;
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goto errRtn;
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}
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}
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if (fPackageLink)
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pdde->SetTopic (wGlobalAddAtom(szFile));
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// Connect to document
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hresult = pdde->m_ProxyMgr.Connect (IID_NULL, CLSID_NULL);
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if (hresult != NOERROR)
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{
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// Excel does not register its document in time if it loads
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// startup macros. So we force it to open the document.
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if (pdde->InitSysConv())
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{
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fSysConnection = TRUE;
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// Try to make the server open the document.
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ErrRtnH (pdde->PostSysCommand (pdde->m_pSysChannel,
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(LPSTR)&achStdOpenDocument,
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FALSE));
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pdde->m_fDidStdOpenDoc = TRUE;
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}
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else
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{
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ErrRtnH (ResultFromScode (CO_E_APPDIDNTREG));
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}
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// Try connecting to document again. Should succeed.
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hresult = pdde->m_ProxyMgr.Connect (IID_NULL, CLSID_NULL);
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}
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}
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else
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{
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// Already running, so assume visible
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pdde->DeclareVisibility (TRUE);
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}
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errRtn:
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if (pdde->m_pSysChannel) {
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if (fSysConnection)
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pdde->TermConv (pdde->m_pSysChannel);
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else
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pdde->DeleteChannel (pdde->m_pSysChannel);
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}
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if (hresult == NOERROR) {
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hresult = punk->QueryInterface (iid, ppv);
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}
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pdde->m_pUnkOuter->Release();
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if (hresult!=NOERROR)
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{
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Warn ("DdeBindToObject failed");
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}
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exitRtn:
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intrDebugOut((DEB_ITRACE,
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"DdeBindToObject szFile(%ws) returns %x \n",
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szFile,hresult));
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return hresult;
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}
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//
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// BUGBUG: This won't work in a multi-threaded world.
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//
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static LPOLESTR szOriginalUNCName;
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static WCHAR cOriginalDrive;
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static INTERNAL InitializeIterator
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(LPCOLESTR wszFile)
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{
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WCHAR wszDrive[] = L"A:\\";
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if ((wszFile == NULL) || (wszFile[1] != ':'))
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{
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return(S_FALSE);
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}
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wszDrive[0] = (WCHAR)CharUpperW((LPWSTR)wszFile[0]);
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if (GetDriveType(wszDrive) == DRIVE_REMOTE)
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{
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DWORD cb = MAX_STR;
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wszDrive[2] = '\0';
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if (NULL==szOriginalUNCName)
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{
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szOriginalUNCName = new WCHAR [MAX_STR];
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}
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if (WN_SUCCESS == OleWNetGetConnection (wszDrive, szOriginalUNCName, &cb))
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{
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cOriginalDrive = (WCHAR)CharUpperW((LPWSTR)wszFile[0]);
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return NOERROR;
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}
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}
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// szFile is not a network file
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return ReportResult (0, S_FALSE, 0, 0);
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}
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// NextEquivalentNetDrive
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//
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// Change the drive letter of szFile to the next (modulo 'Z') drive letter
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// that is connected to the same net drive
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// Return S_FALSE when there are no more equivalent drives
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//
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static INTERNAL NextEquivalentNetDrive
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(LPOLESTR szFile)
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{
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#define incr(c) (c=='Z' ? c='A' : ++c)
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WCHAR wszDrive[3]= L"A:";
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Assert (szFile && szFile[1]==':');
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char cDrive = (char)CharUpperW((LPWSTR)szFile[0]);
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while (cOriginalDrive != incr(cDrive))
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{
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DWORD cb = MAX_PATH;
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WCHAR szUNCName [MAX_PATH];
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wszDrive[0] = cDrive;
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Assert (cDrive >= 'A' && cDrive <= 'Z');
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Assert (szOriginalUNCName);
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if (WN_SUCCESS == OleWNetGetConnection (wszDrive,szUNCName, &cb) &&
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(0 == lstrcmpW (szUNCName, szOriginalUNCName)))
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{
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szFile[0] = cDrive;
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return NOERROR;
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}
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}
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// We've gone through all the drives
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return ReportResult (0, S_FALSE, 0, 0);
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}
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// Dde_IsRunning
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//
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// Attempt to open a document-level conversation using the
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// filename as a topic. If the conversation is established we
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// know the file is running and terminate the conversation.
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// Otherwise it is not running.
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//
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INTERNAL DdeIsRunning
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(CLSID clsid,
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LPCOLESTR szFileIn,
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LPBC pbc,
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LPMONIKER pmkToLeft,
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LPMONIKER pmkNewlyRunning)
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{
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intrDebugOut((DEB_ITRACE,
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"DdeIsRunning szFileIn(%ws)\n",szFileIn));
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ATOM aTopic;
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CDdeObject FAR* pdde=NULL;
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HRESULT hres = ReportResult(0, S_FALSE, 0, 0);
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if (NULL==szFileIn || '\0'==szFileIn[0])
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{
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// A NULL filename is invalid for our purposes.
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// But if we did a DDE_INITIATE, NULL would mean "any topic",
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// and if we were called by RunningMoniker() with CLSID_NULL,
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// then we would be INITIATEing on "any app, any topic" and
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// SHELL (if not others) would respond.
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intrDebugOut((DEB_ITRACE,
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"DdeIsRunning NULL szFileIn\n"));
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hres = S_FALSE;
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goto exitRtn;
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}
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//
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// This protocol doesn't handle the fact that there are two names for
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// every file. This is a bit of a problem. So, we are going to choose
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// the short name as the one to look for. This means that DDE objects
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// using the long filename will not work very well.
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//
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WCHAR szFile[MAX_PATH];
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if ((lstrlenW(szFileIn) == 0) || (GetShortPathName(szFileIn,szFile,MAX_PATH) == 0))
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{
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//
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// Unable to determine a short path for this object. Use whatever we were
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// handed.
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//
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intrDebugOut((DEB_ITRACE,"No conversion for short path. Copy szFileIn\n"));
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lstrcpyW(szFile,szFileIn);
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}
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intrDebugOut((DEB_ITRACE,"Short file szFile(%ws)\n",szFile));
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#ifdef KEVINRO_OLDCODE
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We have removed SzFixNet from the system, since the file system is
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capable of dealing with UNC names now. Therefore, I have removed the
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following lines. I am pretty sure this is going to work, but I am
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leaving this code here until we decide that it is a good decision.
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If you find this, and I haven't removed it, chances are that I forgot
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to remove this code.
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HRESULT hresFixNet;
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UINT dummy;
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// If UNC name, change to drive letter
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LPOLESTR szFile = NULL;
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dummy = 0xFFFF;
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hresFixNet = SzFixNet (pbc, szFile, &szFile, &dummy);
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// SzFixNet may return NOERROR and szFile==NULL
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if (szFile==NULL || hresFixNet != NOERROR)
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{
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aTopic = wGlobalAddAtom(szFile);
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intrAssert(wIsValidAtom(aTopic));
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}
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else
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{
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aTopic = wGlobalAddAtom (szFile);
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intrAssert(wIsValidAtom(aTopic));
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delete szFile;
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}
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#else
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aTopic = wGlobalAddAtom (szFile);
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intrAssert(wIsValidAtom(aTopic));
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#endif // KEVINRO_OLDCODE
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ErrZ (CDdeObject::Create (NULL, clsid, OT_LINK, aTopic, NULL, &pdde));
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if (NOERROR == pdde->DocumentLevelConnect (pbc))
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{
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// It is running!
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// Immediately terminate conversation. We just wanted to know
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// if it was running.
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hres = NOERROR;
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}
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else
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{
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// Not running
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hres = ReportResult(0, S_FALSE, 0, 0);
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}
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errRtn:
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if (aTopic)
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intrAssert(wIsValidAtom(aTopic));
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GlobalDeleteAtom (aTopic);
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if (pdde)
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{
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Assert (pdde->m_refs==1);
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pdde->m_pUnkOuter->Release();
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}
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exitRtn:
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intrDebugOut((DEB_ITRACE,
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"DdeIsRunning szFile(%ws) returns %x\n",szFile,hres));
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return hres;
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}
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#if 0
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INTERNAL DdeIsRunning
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(CLSID clsid,
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LPCSTR cszFile,
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LPBC pbc,
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LPMONIKER pmkToLeft,
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LPMONIKER pmkNewlyRunning)
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{
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HRESULT hresult = NOERROR;
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LPSTR szFile = NULL;
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// Normal case
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if (NOERROR == Dde_IsRunning (clsid, cszFile, pbc, pmkToLeft,
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pmkNewlyRunning))
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{
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return NOERROR;
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}
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if (cszFile[0]=='\\' && cszFile[1]=='\\')
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{
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RetErr (SzFixNet (pbc, (LPSTR)cszFile, &szFile));
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|
|
// Try with a drive letter instead of a UNC name
|
||
|
|
if (NOERROR==Dde_IsRunning (clsid, szFile, pbc, pmkToLeft,
|
||
|
|
pmkNewlyRunning))
|
||
|
|
{
|
||
|
|
hresult = NOERROR;
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
szFile = UtDupString (cszFile); // so it can be deleted
|
||
|
|
}
|
||
|
|
|
||
|
|
// If failure, see if the file is running under a different net
|
||
|
|
// drive letter that is mapped to the same drive.
|
||
|
|
|
||
|
|
if (InitializeIterator (szFile) != NOERROR)
|
||
|
|
{
|
||
|
|
// file is probably not on a network drive
|
||
|
|
hresult = ResultFromScode (S_FALSE);
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (NOERROR==NextEquivalentNetDrive (szFile))
|
||
|
|
{
|
||
|
|
if (NOERROR == Dde_IsRunning (clsid, szFile, pbc, pmkToLeft,
|
||
|
|
pmkNewlyRunning))
|
||
|
|
{
|
||
|
|
hresult = NOERROR;
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// not running
|
||
|
|
hresult = ResultFromScode (S_FALSE);
|
||
|
|
|
||
|
|
errRtn:
|
||
|
|
delete szFile;
|
||
|
|
return hresult;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// CDdeObject::DocumentLevelConnect
|
||
|
|
//
|
||
|
|
// Try to connect to document (m_aTopic) even if the document is running
|
||
|
|
// under a different drive letter that is mapped to the same network drive.
|
||
|
|
//
|
||
|
|
INTERNAL CDdeObject::DocumentLevelConnect
|
||
|
|
(LPBINDCTX pbc)
|
||
|
|
{
|
||
|
|
ATOM aOriginal;
|
||
|
|
ATOM aTopic;
|
||
|
|
|
||
|
|
intrDebugOut((DEB_ITRACE,
|
||
|
|
"CDdeObject::DocumentLevelConnect(%x)\n",this));
|
||
|
|
HRESULT hresult = NOERROR;
|
||
|
|
|
||
|
|
// Normal case
|
||
|
|
if (NOERROR==m_ProxyMgr.Connect (IID_NULL, CLSID_NULL))
|
||
|
|
{
|
||
|
|
goto exitRtn;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
WCHAR szFile[MAX_STR];
|
||
|
|
WCHAR szUNCFile[MAX_STR];
|
||
|
|
|
||
|
|
Assert (wIsValidAtom (m_aTopic));
|
||
|
|
if (GlobalGetAtomName (m_aTopic, szFile, MAX_STR) == 0)
|
||
|
|
{
|
||
|
|
hresult = E_UNEXPECTED;
|
||
|
|
goto exitRtn;
|
||
|
|
}
|
||
|
|
aOriginal = wDupAtom (m_aTopic);
|
||
|
|
intrAssert(wIsValidAtom(aOriginal));
|
||
|
|
|
||
|
|
intrDebugOut((DEB_ITRACE,
|
||
|
|
"::DocumentLevelConnect(szFile=%ws)\n",this,szFile));
|
||
|
|
if (NOERROR != InitializeIterator (szFile))
|
||
|
|
{
|
||
|
|
// szFile probably not a network file
|
||
|
|
hresult = ResultFromScode (S_FALSE);
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (NOERROR == NextEquivalentNetDrive (szFile))
|
||
|
|
{
|
||
|
|
SetTopic (aTopic = wGlobalAddAtom (szFile));
|
||
|
|
if (NOERROR==m_ProxyMgr.Connect (IID_NULL, CLSID_NULL))
|
||
|
|
{
|
||
|
|
// Inform client of new drive letter
|
||
|
|
ChangeTopic (wAtomNameA(aTopic));
|
||
|
|
hresult = NOERROR;
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
SetTopic ((ATOM)0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Try with full UNC name
|
||
|
|
lstrcpyW (szUNCFile, szOriginalUNCName);
|
||
|
|
lstrcatW (szUNCFile, szFile+2); // skip X:
|
||
|
|
SetTopic (aTopic = wGlobalAddAtom (szUNCFile));
|
||
|
|
if (NOERROR==m_ProxyMgr.Connect (IID_NULL, CLSID_NULL))
|
||
|
|
{
|
||
|
|
// Inform client of new name
|
||
|
|
ChangeTopic (wAtomNameA(aTopic));
|
||
|
|
hresult = NOERROR;
|
||
|
|
goto errRtn;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
SetTopic ((ATOM)0);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Not running
|
||
|
|
hresult = S_FALSE;
|
||
|
|
|
||
|
|
errRtn:
|
||
|
|
if (NOERROR != hresult)
|
||
|
|
SetTopic (aOriginal);
|
||
|
|
delete szOriginalUNCName;
|
||
|
|
szOriginalUNCName = NULL;
|
||
|
|
|
||
|
|
exitRtn:
|
||
|
|
intrDebugOut((DEB_ITRACE,
|
||
|
|
"CDdeObject::DocumentLevelConnect(%x) returns %x\n",
|
||
|
|
this,hresult));
|
||
|
|
|
||
|
|
return hresult;
|
||
|
|
}
|