347 lines
7.8 KiB
C++
347 lines
7.8 KiB
C++
/*----------------------------------------------------------------------------
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iedde.cpp
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Sends URL open command to IE using DDE
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Copyright (C) 1995-96 Microsoft Corporation
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All right reserved
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Authors:
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VetriV Vellore T. Vetrivelkumaran
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jmazner Jeremy Mazner
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History:
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8/29/96 jmazner created, with minor changes for 32 bit world, from
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VetriV's ie16dde.cpp
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----------------------------------------------------------------------------*/
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#include "isignup.h"
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#if defined(WIN16)
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#include <windows.h>
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#endif
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#include <ddeml.h>
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#include <stdio.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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static FARPROC lpfnDDEProc;
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static HCONV hConv = (HCONV) NULL;
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static HSZ hszMosaicService = (HSZ) NULL;
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static HSZ hszTopic = (HSZ) NULL;
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static HSZ hszItem = (HSZ) NULL;
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static DWORD g_dwInstance = 0;
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//+---------------------------------------------------------------------------
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//
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// Function: Dprintf
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//
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// Synopsis: Prints the values contained in the variable number of
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// arguments in the specified format
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//
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// Arguments: [pcsz - Format string]
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//
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// Returns: Nothing
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//
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// History: 8/9/96 VetriV Created
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//
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//----------------------------------------------------------------------------
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void Dprintf(LPCSTR pcsz, ...)
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{
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#ifdef DEBUG
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va_list argp;
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char szBuf[1024];
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va_start(argp, pcsz);
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wvsprintf(szBuf, pcsz, argp);
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OutputDebugString(szBuf);
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va_end(argp);
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#endif
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}
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//+---------------------------------------------------------------------------
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//
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// Function: DdeCallback
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//
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// Synopsis: Callback function used in DDEIntialize
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//
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// Arguments: [Please see DdeInitialize documentation]
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//
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// Returns: Nothing
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//
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// History: 8/9/96 VetriV Created
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// 8/29/96 jmazner minor change in signature for 32 bit world
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//
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//----------------------------------------------------------------------------
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#if defined(WIN16)
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extern "C"
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HDDEDATA CALLBACK _export DdeCallBack(UINT uType, // transaction type
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#else
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HDDEDATA CALLBACK DdeCallBack(UINT uType, // transaction type
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#endif
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UINT uFmt, // clipboard data format
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HCONV hconv, // handle of the conversation
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HSZ hsz1, // handle of a string
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HSZ hsz2, // handle of a string
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HDDEDATA hdata, // handle of a global memory object
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DWORD dwData1, // transaction-specific data
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DWORD dwData2) // transaction-specific data
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{
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return 0;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: OpenURL
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//
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// Synopsis: Opens the given URL use DDE.
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// Warning: This function uses global static variables and hence
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// it is not re-entrant.
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//
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// Arguments: [lpsszURL - URL to be opened]
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//
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// Returns: Nothing
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//
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// History: 8/9/96 VetriV Created
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// 9/3/96 jmazner Minor tweaks; moved string handle code in from DdeInit
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//
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//----------------------------------------------------------------------------
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int OpenURL(LPCTSTR lpcszURL)
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{
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TCHAR szOpenURL[] = TEXT("WWW_OpenURL");
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TCHAR szRemainingParams[] = TEXT("\"\",-1,0,\"\",\"\",\"\"");
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TCHAR szArg[1024];
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HDDEDATA trans_ret;
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long long_result;
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if ((NULL == lpcszURL) || ('\0' == lpcszURL[0]))
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goto ErrorOpenURL;
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//
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// Create String handle for the Operation WWW_OpenURL
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//
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if (hszTopic)
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DdeFreeStringHandle(g_dwInstance, hszTopic);
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hszTopic = DdeCreateStringHandle(g_dwInstance, szOpenURL, CP_WINANSI);
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if (!hszTopic)
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{
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Dprintf("DdeCreateStringHandle for %s failed with %u\r\n",
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szOpenURL, DdeGetLastError(g_dwInstance));
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goto ErrorOpenURL;
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}
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//
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// Compose the argument string
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//
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if (lstrlen(lpcszURL) + lstrlen(szRemainingParams) > 1020)
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goto ErrorOpenURL;
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memset(szArg, 0, sizeof(szArg));
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wsprintf(szArg, TEXT("\"%s\",%s"), lpcszURL, szRemainingParams);
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//
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// Create String Handle for the Arguments
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//
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if (hszItem)
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DdeFreeStringHandle(g_dwInstance, hszItem);
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hszItem = DdeCreateStringHandle(g_dwInstance, szArg, CP_WINANSI);
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if (!hszItem)
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{
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Dprintf("DdeCreateStringHandle for %s failed with %u\r\n",
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szArg, DdeGetLastError(g_dwInstance));
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goto ErrorOpenURL;
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}
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//
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// Connect to DDE Server
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//
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hConv = DdeConnect(g_dwInstance, hszMosaicService, hszTopic, NULL);
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if (!hConv)
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{
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Dprintf("DdeConnect failed with %u\r\n",
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DdeGetLastError(g_dwInstance));
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goto ErrorOpenURL;
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}
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//
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// Request
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//
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trans_ret = DdeClientTransaction(NULL, 0, hConv, hszItem, CF_TEXT,
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XTYP_REQUEST, 60000, NULL);
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//
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// long integer return value
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//
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if (trans_ret != DDE_FNOTPROCESSED)
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{
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DdeGetData(trans_ret, (LPBYTE) &long_result, sizeof(long_result), 0);
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DdeFreeDataHandle(trans_ret);
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return 0; // Successfully started opening the URL
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}
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else
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{
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Dprintf("DdeClientTransaction failed with %u\r\n",
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DdeGetLastError(g_dwInstance));
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goto ErrorOpenURL;
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}
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ErrorOpenURL:
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if (hConv)
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{
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DdeDisconnect(hConv);
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hConv = (HCONV) NULL;
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}
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if (hszTopic)
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{
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DdeFreeStringHandle(g_dwInstance, hszTopic);
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hszTopic = NULL;
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}
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if (hszItem)
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{
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DdeFreeStringHandle(g_dwInstance, hszItem);
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hszItem = NULL;
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}
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return -1;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: DDEClose
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//
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// Synopsis: Shutsdown DDE and releases string handles
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// Warning: This function uses global static variables and hence
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// it is not re-entrant.
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//
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// Arguments: None
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//
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// Returns: Nothing
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//
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// History: 8/9/96 VetriV Created
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//
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//----------------------------------------------------------------------------
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void DDEClose(void)
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{
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Dprintf("DDEClose called\r\n");
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if (0 != g_dwInstance)
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{
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if (hConv)
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{
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DdeDisconnect(hConv);
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hConv = (HCONV) NULL;
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}
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if (hszTopic)
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{
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DdeFreeStringHandle(g_dwInstance, hszTopic);
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hszTopic = NULL;
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}
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if (hszItem)
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{
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DdeFreeStringHandle(g_dwInstance, hszItem);
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hszItem = NULL;
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}
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if (hszMosaicService)
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{
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DdeFreeStringHandle(g_dwInstance, hszMosaicService);
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hszMosaicService = NULL;
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}
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DdeUninitialize(g_dwInstance);
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g_dwInstance = 0;
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}
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return;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: DDEinit
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//
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// Synopsis: Intializes DDE, creates string handles for service
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// and registers the names.
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// Warning: This function uses global static variables and hence
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// it is not re-entrant.
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//
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// Arguments: [hInst - Instance handle]
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//
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// Returns: 0 if successful
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// Negative values, otherwise
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//
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// History: 8/9/96 VetriV Created
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// 8/29/96 jmazner Removed calls to make us a DDE server,
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// moved string handle code to openUrl
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//
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//----------------------------------------------------------------------------
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int DDEInit(HINSTANCE hInst)
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{
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UINT uiRetValue;
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Dprintf("DDEInit called with %u\r\n", hInst);
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if (g_dwInstance == 0)
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{
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lpfnDDEProc = MakeProcInstance((FARPROC) DdeCallBack, hInst);
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if (NULL == lpfnDDEProc)
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{
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Dprintf("MakeProcInstance failed");
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return -1;
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}
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uiRetValue = DdeInitialize(&g_dwInstance, (PFNCALLBACK) lpfnDDEProc,
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APPCLASS_STANDARD, 0);
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if (DMLERR_NO_ERROR != uiRetValue)
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{
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Dprintf("DdeInitialize failed with %u\r\n", uiRetValue);
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g_dwInstance = 0;
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return -2;
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}
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}
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hszMosaicService = DdeCreateStringHandle(g_dwInstance, TEXT("IEXPLORE"), CP_WINANSI);
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if (NULL == hszMosaicService)
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{
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Dprintf("DdeCreateStringHandle for IEXPLORE failed with %u\r\n",
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DdeGetLastError(g_dwInstance));
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}
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return( TRUE );
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}
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