Waiting for another application window

What is the best way (with a view to optimization and using system resources) to make waiting in my application when window of another app will be shown?

For example:

1. My application starts.
2. Waiting while, for example, Notepad will be started so i can get handle of its window.
3. Using handle im doing something with it and then closing my app.

How to accomplish item 2? I know only one possible way: just check if handle exis开发者_StackOverflowts in loop using FindWindow. But I hope there is a more smart solution exists.

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If you launched the process (with CreateProcess) use WaitForInputIdle and then start the FindWindow loop. Adding a Sleep(20) or something to the loop will ensure your resource usage is minimal.

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I dont think the same... I think the best way is windows hooking process... USING HOOKS

... Please see: WH_CBT and you have to be watching the event: HCBT_CREATEWND