141 lines
3.0 KiB
C++
141 lines
3.0 KiB
C++
/*++
|
|
|
|
Copyright (c) 2000 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
ForceAnsiWindowProc.cpp
|
|
|
|
Abstract:
|
|
|
|
Apps call GetWindowLongA() to get a window procedure and subsequently
|
|
does not call CallWindowProc() with the value returned from
|
|
GetWindowLongA(). This SHIM calls GetWindowLongW( ), which returns the
|
|
window procedure.
|
|
If the app wants a Dialog procedure, we pass back our function
|
|
and subsequently call CallWindowProc() in our function. SetWindowLongA()
|
|
is hooked to prevent the app from setting our function as a Dialog Proc.
|
|
|
|
Notes:
|
|
|
|
This is a general purpose SHIM
|
|
History:
|
|
|
|
03/16/2000 prashkud Created
|
|
01/30/2001 prashkud Converted to a general SHIM
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(ForceAnsiWindowProc)
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(SetWindowLongA)
|
|
APIHOOK_ENUM_ENTRY(GetWindowLongA)
|
|
APIHOOK_ENUM_END
|
|
|
|
#define HANDLE_MASK 0xffff0000
|
|
LONG g_lGetWindowLongRet = 0;
|
|
|
|
LRESULT
|
|
MyProcAddress(
|
|
HWND hWnd,
|
|
UINT uMsg,
|
|
WPARAM wParam,
|
|
LPARAM lParam
|
|
)
|
|
{
|
|
return CallWindowProcA(
|
|
(WNDPROC) g_lGetWindowLongRet,
|
|
hWnd,
|
|
uMsg,
|
|
wParam,
|
|
lParam
|
|
);
|
|
}
|
|
|
|
LONG
|
|
APIHOOK(SetWindowLongA)(
|
|
HWND hwnd,
|
|
int nIndex,
|
|
LONG dwNewLong
|
|
)
|
|
{
|
|
LONG lRet = 0;
|
|
|
|
// If the address that is being set is my address, don't!
|
|
if (dwNewLong == (LONG)MyProcAddress)
|
|
{
|
|
lRet = 0;
|
|
}
|
|
else
|
|
{
|
|
lRet = ORIGINAL_API(SetWindowLongA)(hwnd,nIndex,dwNewLong);
|
|
}
|
|
|
|
return lRet;
|
|
}
|
|
|
|
/*++
|
|
|
|
This function intercepts GetWindowLong( ), checks the nIndex for GWL_WNDPROC
|
|
and if it is,calls GetWindowLongW( ). Otherwise, it calls GetWindowLongA( )
|
|
|
|
--*/
|
|
|
|
LONG
|
|
APIHOOK(GetWindowLongA)(
|
|
HWND hwnd,
|
|
int nIndex )
|
|
{
|
|
LONG lRet = 0;
|
|
|
|
// Apply the modification only if the App wants a WindowProc.
|
|
if ((nIndex == GWL_WNDPROC) ||
|
|
(nIndex == DWL_DLGPROC))
|
|
{
|
|
if ((nIndex == GWL_WNDPROC))
|
|
{
|
|
lRet = GetWindowLongW(hwnd, nIndex);
|
|
}
|
|
else
|
|
{
|
|
g_lGetWindowLongRet = ORIGINAL_API(GetWindowLongA)(
|
|
hwnd,
|
|
nIndex
|
|
);
|
|
if ((g_lGetWindowLongRet & HANDLE_MASK) == HANDLE_MASK)
|
|
{
|
|
lRet = (LONG) MyProcAddress;
|
|
}
|
|
else
|
|
{
|
|
lRet = g_lGetWindowLongRet;
|
|
}
|
|
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lRet = ORIGINAL_API(GetWindowLongA)(hwnd, nIndex);
|
|
}
|
|
|
|
return lRet;
|
|
}
|
|
|
|
/*++
|
|
|
|
Register hooked functions
|
|
|
|
--*/
|
|
|
|
HOOK_BEGIN
|
|
APIHOOK_ENTRY(USER32.DLL, SetWindowLongA)
|
|
APIHOOK_ENTRY(USER32.DLL, GetWindowLongA)
|
|
HOOK_END
|
|
|
|
IMPLEMENT_SHIM_END
|
|
|