Suspending a riot process..how?

[Shub-Nigurrath]

oh God,
I now have this situation: in VC++ the loader works fine, even with no breakpoints (continuous execution), but externally I have this behaviour

-the ProcessId is correctly found using the handle of the main process window,
-then it's passed to OpenProcess, which returns NULL
-the GetLastError message reports 0, "The operation completed succesfully"...?????
this happens only when running outside VC++.

Alternatively, always outside VC++, some times instead the OpenProcess returns a valid handle but zwSuspendProcess is unable to suspend it..

Another question, once I have the handle coming from OpenProcess how can I suspend the Thread? Now I'm using zwSuspendProcess() but seems to give some problems indeed..

any glue!?!?