How can I tell if a form is closed from the controlbox (system menu) or from a call to Form.Close?

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How can I tell if a form is closed from the controlbox (system menu) or from a call to Form.Close?

April 26, 2017closed form menu system

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When solving for a closed solution to dynamical system questions, what happens if we cannot form an eigenbasis?
How can I tell if a form is closed from the controlbox (system menu) or from a call to Form.Close?
How do I make my graph window be contained in a VB form (ie. no title bar, system menu, etc.)?

score 0 · Answer 1 · 2009-04-14T00:21:52+00:00

One way to do this is to override the form’s WndProc method and check for WM_SYSCOMMAND and SC_CLOSE. Looking for WM_CLOSE in the override is not sufficient as WM_CLOSE is seen in both cases. A sample is available for download (C#, VB).

How can I tell if a form is closed from the controlbox (system menu) or from a call to Form.Close?

1 Answer

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