How do I close a process/program using it's window handle?

[kaanuki]

Hello, all.

My program uses another application to complete two seperate tasks. My program must open 2 instances of the application(as processes) at one time. The 1st process opens onLoad. The 2nd process can be opened with a button.

I am trying to program a close-button that closes the 2nd instance of that process only, using its windowhandle. How do I close the 2nd process only?

I am grabbing the handle of the very 1st process onLoad using this:

procMyProg_handle1 = procAll(0).MainWindowHandle

I have tried:

procAll(0).Kill

- however, this does not reliably kill the 2nd process - It kills the 1st process sometimes.

Can I kill the process by its window handle?

Thanks.

-kaanuki-
vb2005 express edition