66 lines
949 B
C++
66 lines
949 B
C++
/*++
|
|
|
|
Copyright (c) 2002 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
DrEye.cpp
|
|
|
|
Abstract:
|
|
|
|
The App calls GetFocus Which returned NULL. This value was passed onto CWnd::FromHandle.
|
|
CWnd::FromHandle returned NULL. App checked for this return value & threw AV.
|
|
|
|
The fix is to return a valid handle when GetFocus is called.
|
|
|
|
Notes:
|
|
|
|
This is an app specific shim.
|
|
|
|
History:
|
|
|
|
01/07/2002 mamathas Created
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(DrEye)
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(GetFocus)
|
|
APIHOOK_ENUM_END
|
|
|
|
/*++
|
|
|
|
Hook GetFocus and try to return a valid handle.
|
|
|
|
--*/
|
|
|
|
HWND
|
|
APIHOOK(GetFocus)()
|
|
{
|
|
HWND hWnd = ORIGINAL_API(GetFocus)();
|
|
|
|
if (hWnd) {
|
|
return hWnd;
|
|
}
|
|
else {
|
|
return GetDesktopWindow();
|
|
}
|
|
}
|
|
|
|
/*++
|
|
|
|
Register hooked functions
|
|
|
|
--*/
|
|
|
|
HOOK_BEGIN
|
|
APIHOOK_ENTRY(USER32.DLL, GetFocus)
|
|
HOOK_END
|
|
|
|
IMPLEMENT_SHIM_END
|
|
|