127 lines
2.3 KiB
C++
127 lines
2.3 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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CorelSiteBuilder.cpp
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Abstract:
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App repeatedly calls SetWindowTextA with the same title causing
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flickering. This repros on some machines and not others: we don't know why.
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Notes:
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This is an app specific shim.
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History:
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01/31/2001 linstev Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(CorelSiteBuilder)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(SetWindowTextA)
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APIHOOK_ENUM_END
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HWND g_hLast = NULL;
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CString * g_csLastWindowText = NULL;
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CRITICAL_SECTION g_csGlobals;
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/*++
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Only send the message if the text has changed.
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--*/
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BOOL
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APIHOOK(SetWindowTextA)(
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HWND hWnd,
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LPCSTR lpString
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)
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{
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EnterCriticalSection(&g_csGlobals);
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if (lpString)
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{
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CSTRING_TRY
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{
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CString csString(lpString);
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if ((g_hLast == hWnd) && g_csLastWindowText->Compare(csString) == 0) {
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//
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// We have the same window and title, don't bother setting it again
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//
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LeaveCriticalSection(&g_csGlobals);
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return TRUE;
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}
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//
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// Store the current settings as the last known values
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//
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g_hLast = hWnd;
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*g_csLastWindowText = csString;
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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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LeaveCriticalSection(&g_csGlobals);
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return ORIGINAL_API(SetWindowTextA)(hWnd, lpString);
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason)
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{
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if (fdwReason == DLL_PROCESS_ATTACH) {
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CSTRING_TRY
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{
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if (!InitializeCriticalSectionAndSpinCount(&g_csGlobals, 0x80000000))
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{
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return FALSE;
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}
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g_csLastWindowText = new CString;
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if (g_csLastWindowText == NULL)
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{
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return FALSE;
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}
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}
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CSTRING_CATCH
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{
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return FALSE;
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}
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}
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return TRUE;
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}
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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APIHOOK_ENTRY(USER32.DLL, SetWindowTextA)
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HOOK_END
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IMPLEMENT_SHIM_END
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