I tried PostMessage as well

[ForNow]

I was told PostMessage would work for IPC the child process never gets control

[Victor Nijegorodov]

How do you use it? What message ID do you use?

[leon de boer]

The child probably wont see the message because the parent isn't passing it up. Very few messages are passed from a parent to a child unless you specify it beyond the obvious stuff like keyboard and mouse. Depending on the ID it isn't clear to me a message will be passed to a child window I need to know more about the window types and flags involved.

In vino veritas