How can I simulate a button click given the handle to the button's window?

Question

I want to simulate a click on a button located in a dialog box.

I have the handle to that window. This is an Abort/Retry/Ignore kind of window.

I don\'t wan

Answer 1

Send a BM_CLICK message to the HWND of the button:

SendMessage(hButton, BM_CLICK, 0, 0);

That causes the button to receive WM_LBUTTONDOWN and WM_LBUTTONUP messages, and the parent to receive an BN_CLICKED notification, as if the user had physically clicked on the button.