I want to know Is the system menu (in the top-left corner of form) open? and if yes Close it. How can I do it in .NET?
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Can you modify the code of the form you want to close it's main menu? – Hamid Pourjam May 02 '16 at 12:02
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Your process? Another process? Do you have the source code or is it not under your control? – IInspectable May 02 '16 at 12:02
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Override with your own, then close it, see https://stackoverflow.com/questions/4615940/how-can-i-customize-the-system-menu-of-a-windows-form for further detail. – MathuSum Mut May 02 '16 at 12:08
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this issue is discussed in many pages like this: http://stackoverflow.com/questions/19918264/how-i-could-cancel-opening-the-system-menu-of-an-application but I want to Close this menu – mosafer_deltang May 02 '16 at 12:10
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MathuSum Mut, can you help me by code? – mosafer_deltang May 02 '16 at 12:29
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in Menu Functions I don't see a functions for close system menu : https://msdn.microsoft.com/en-us/library/windows/desktop/ms646977%28v=vs.85%29.aspx – mosafer_deltang May 02 '16 at 12:32
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You can call [EndMenu](https://msdn.microsoft.com/en-us/library/windows/desktop/ms647637.aspx) to *"end the calling thread's active menu"*. – IInspectable May 02 '16 at 17:00