160 lines
2.8 KiB
C++
160 lines
2.8 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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NBALive.cpp
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Abstract:
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On Win9x, SetWindowText used to pass the pointer directly to the window
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proc in a WM_SETTEXT message. However, on NT, the string goes through the
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standard message workers and get's converted to unicode etc. When it does
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get to the window proc, it's not the original pointer.
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NBA Live 99 depends on the pointer being the same, since it sends more than
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just the string.
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The fix is to subclass the WindowProc on SetWindowText and change the
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pointer (in lParam) to the one that was originally passed.
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Notes:
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This is an app specific shim.
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History:
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06/19/2000 linstev Created
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--*/
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#include "precomp.h"
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// This module has been given an official blessing to use the str routines.
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#include "LegalStr.h"
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IMPLEMENT_SHIM_BEGIN(NBALive)
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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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//
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// Critical section for global variable access
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//
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CRITICAL_SECTION g_csGlobals;
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//
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// Text for window and previous windowproc
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//
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CHAR *g_szText;
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WNDPROC g_lpWndProc;
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/*++
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The subclassed windowproc that we use to change the text pointer to the
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original one passed to SetWindowTextA.
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--*/
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LRESULT
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CALLBACK
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WindowProcA(
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HWND hWnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam
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)
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{
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if (uMsg == WM_SETTEXT) {
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if (lParam) {
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if (strcmp(g_szText, (CHAR *) lParam) == 0) {
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lParam = (LPARAM) g_szText;
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}
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}
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}
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return CallWindowProcA(g_lpWndProc, hWnd, uMsg, wParam, lParam);
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}
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/*++
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Subclass the windowproc for this call and fix the pointer that comes out in
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the WM_SETTEXT message that is generated by SetWindowTextA.
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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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BOOL bRet = FALSE;
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//
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// Set the text for this window
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//
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EnterCriticalSection(&g_csGlobals);
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//
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// Subclass the window
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//
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g_lpWndProc = (WNDPROC) GetWindowLongA(hWnd, GWL_WNDPROC);
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if (g_lpWndProc) {
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SetWindowLongA(hWnd, GWL_WNDPROC, (LONG_PTR) WindowProcA);
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}
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//
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// Call the original function which generates a WM_SETTEXT message
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//
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g_szText = (CHAR *) lpString;
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bRet = ORIGINAL_API(SetWindowTextA)(hWnd, lpString);
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//
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// Restore the wndproc
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//
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SetWindowLongA(hWnd, GWL_WNDPROC, (LONG_PTR) g_lpWndProc);
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LeaveCriticalSection(&g_csGlobals);
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return bRet;
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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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InitializeCriticalSection(&g_csGlobals);
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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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