Re: CreateRemoteThread in DLL

I've a question regarding CreateRemoteThread in a DLL I am creating.

I am trying to inject some code into a foreign process with the aid of a DLL.

I've created a project for the DLL. I have two functions in it.

BOOL WINAPI Test()
{
 return TRUE; // Don't do anything for now, just return TRUE
}

__declspec(dllexport) BOOL Inject()
{
 // For simplicity and brevity, I've removed error checking
 DWORD dwPID;
 GetWindowThreadProcessId(SomeHWnd, &dwPID);
 HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwPID);
 BYTE *pAddr = (BYTE *)VirtualAllocEx(hProcess, NULL, 1024, MEM_COMMIT,
PAGE_EXECUTE_READWRITE);
 WriteProcessMemory(hProcess, pAddr, (void *)&Test, 1024, NULL);

 HANDLE hThread = CreateRemoteThread(hProcess, NULL, 0,
(LPTHREAD_START_ROUTINE)pAddr, NULL, 0, NULL);
 ...
}

When I try to call the DLL function Inject() in my program,
CreateRemoteThread() always causes the foreign process to crash.

On the other hand, suppose I wrote this Inject() code in my MFC program,
which is an application and not a DLL. If I do it this way, the code works
correctly.

Why is it that if I hard code Inject() into my APPLICATION, the foreign
process does not crash; however, if I code Inject() into a DLL and have my
application call the Inject() function from the DLL, the FOREIGN process
crashes?

Thank you for the help.