I did a little testing, and Enter did nothing when it was a Win32::GUI::Window, but it pressed button 1 when it was a Win32::GUI::DialogBox.

I also could not change the default button. I suspect it cannot be changed once the window is created.

That doesn't mean it's hopeless. What you can do is capture Enter and give it the behaviour you want. In fact, I think CDialog in MFC does just that. You could check the MFC sources for CDialog If you have access to VC++.

In reply to Re^3: How to change the default (ok) button in Win32::GUI by ikegami
in thread How to change the default (ok) button in Win32::GUI by ChrisR

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