Re: Can I not OpenProcess(PROCESS_ALL_ACCESS...) in DLL under WinXP?

No, I didn' call OpenProcess in DllMain... I am sure that the same
thing was done in dll and exe.
The following is my code:

bool __stdcall _FindApp(wstring sClass, wstring sImage,
PROCESS_INFORMATION *pi)
{
DECLARE_DBG_SCOPE(_FindApp, true)

TCHAR buf[MAXSTR]=NULLSTR;
HWND hWnd=NULL;

hWnd=FindWindow((TCHAR *)sClass.c_str(), NULL);
pi->dwThreadId=GetWindowThreadProcessId(hWnd, &pi->dwProcessId);
pi->hProcess=OpenProcess(PROCESS_ALL_ACCESS, FALSE, pi->dwProcessId);

ASSERT(pi->hProcess); //in debug mode or under vista, this line
passes. but in xp, pi->hProcess==NULL and
GetLastError()==ACCESS_DENIED

GetModuleBaseName(pi->hProcess, NULL, buf, MAXSTR);
if(!hWnd || wstring(buf)!=sImage)
{
 CloseHandle(pi->hProcess);
 return false;
}

pi->hThread=OpenThread(THREAD_ALL_ACCESS, FALSE, pi->dwThreadId);
return true;
}