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API - GetDlgItem problem

Hello everyone,
I am trying to fill in a textbox that is not in my application.
I have the handler of the main window with : API : FindWindow.
And I'm trying to get the handler of the textbox in question.
There is the API function GetDlgItem(hwndMainWindow, TextBoxID).
I have tried to get the id from SPYxx. There the control ID for that
textbox is changing everytime the handler changes, but the Window Proc
doesn't.
I've tried to pass that value but it's not working.

Does anybody know how to get the Id of the textbox?

Thanks a lot.

Feb 13 '06 #1
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