153 lines
3.4 KiB
C++
153 lines
3.4 KiB
C++
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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ForceAnsiGetDisplayNameOf.cpp
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Abstract:
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This shim force the routine IShellFolder::GetDisplayNameOf to return
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an Ascii string whenever it detects that GetDisplayNameOf returned
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a unicode string.
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Notes:
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This is an app is generic.
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History:
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07/26/2000 mnikkel Created
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02/15/2002 mnikkel Modified to use strsafe.h
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(ForceAnsiGetDisplayNameOf)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(SHGetDesktopFolder)
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APIHOOK_ENUM_ENTRY_COMSERVER(SHELL32)
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APIHOOK_ENUM_END
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IMPLEMENT_COMSERVER_HOOK(SHELL32)
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/*++
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Hook SHGetDesktopFolder to get the IShellFolder Interface Pointer.
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--*/
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HRESULT
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APIHOOK(SHGetDesktopFolder)(
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IShellFolder **ppshf
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)
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{
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HRESULT hReturn;
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hReturn = ORIGINAL_API(SHGetDesktopFolder)(ppshf);
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if (SUCCEEDED(hReturn))
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{
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HookObject(
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NULL,
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IID_IShellFolder,
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(PVOID*)ppshf,
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NULL,
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FALSE);
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}
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return hReturn;
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}
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/*++
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Hook GetDisplayName of and when it returns a unicode string convert it over to
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an ANSI string.
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--*/
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HRESULT
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COMHOOK(IShellFolder, GetDisplayNameOf)(
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PVOID pThis,
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LPCITEMIDLIST pidl,
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DWORD uFlags,
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LPSTRRET lpName
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)
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{
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HRESULT hrReturn = E_FAIL;
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BOOL bNotConverted = TRUE;
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_pfn_IShellFolder_GetDisplayNameOf pfnOld =
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ORIGINAL_COM(IShellFolder, GetDisplayNameOf, pThis);
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if (pfnOld)
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{
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hrReturn = (*pfnOld)(pThis, pidl, uFlags, lpName);
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// Check for unicode string and validity
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if ((S_OK == hrReturn) && lpName &&
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(lpName->uType == STRRET_WSTR) && lpName->pOleStr)
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{
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LPMALLOC pMalloc;
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LPWSTR pTemp = lpName->pOleStr;
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// Get a pointer to the Shell's IMalloc interface.
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if (SUCCEEDED(SHGetMalloc(&pMalloc)))
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{
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CSTRING_TRY
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{
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// Copy the OleStr to Cstr
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CString csOleStr(lpName->pOleStr);
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if (StringCchCopyA(lpName->cStr, ARRAYSIZE(lpName->cStr), csOleStr.GetAnsi()) == S_OK)
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{
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// set the uType to CSTR and free the old unicode string.
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lpName->uType = STRRET_CSTR;
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pMalloc->Free(pTemp);
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LOGN(
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eDbgLevelError,
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"[IShellFolder_GetDisplayNameOf] Converted string from Unicode to ANSI: %s",
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lpName->cStr);
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bNotConverted = FALSE;
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}
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}
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CSTRING_CATCH
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{
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// do nothing
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}
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}
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}
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}
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if (bNotConverted)
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{
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LOGN(
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eDbgLevelError,
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"[IShellFolder_GetDisplayNameOf] Unable to convert string from Unicode to ANSI");
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}
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return hrReturn;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY_COMSERVER(SHELL32)
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APIHOOK_ENTRY(SHELL32.DLL, SHGetDesktopFolder)
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COMHOOK_ENTRY(ShellDesktop, IShellFolder, GetDisplayNameOf, 11)
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HOOK_END
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IMPLEMENT_SHIM_END
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