Kill program which was started with CreateProcess

[riov]

Hello,
I need a way to kill a program which was started with CreateProcess.
My CreateProcess line:

CreateProcess sA, sB, ByVal 0&, ByVal 0&, 1, 0&, ByVal 0&, vbNullString, si, pi

I want to send WM_CLOSE with PostMessage, wait for 2 seconds and if program is still running use TerminateProcess.

I had no luck in doing any of that. TerminateProcess is working only if I call it straight after CreateProcess, if I want 1 second for example it is no longer working. EnumWindows API is somehow also not working, so I cannot use PostMessage.

[riov]

Anyone?
I know why TerminateProcess was not working for me as expected. It was not killing child processes. Question is how to find them.