Would anyone be able to provide an example use of WM_GETMINMAXINFO?

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I'm trying to change the maximum/minimum size of another application, and example usage of this pinvoke call in C# is surprisingly hard to find. Could someone help me?

Posted 2-Jun-13 11:41am

RadXPictures

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[no name] 2-Jun-13 18:41pm

http://www.pinvoke.net/search.aspx?search=wm_getminmaxinfo&namespace=[All]

RadXPictures 2-Jun-13 18:52pm

I already visited that page... None of the examples actual reference specific pinvoke calls. I guess I should have been more specific... I know it is called using the WindowProc function, and I have yet to find any example code using this or related methods

[no name] 2-Jun-13 19:41pm

Probably because WM_GETMINMAXINFO is a Windows message identifier and not a function call. So there is no way to P/Invoke it. Sounds to me that you want the SetWindowPos function or maybe even MoveWindow.

Sergey Alexandrovich Kryukov 2-Jun-13 20:50pm

If course, this is just the Windows message ID. SendMessage/PostMessage should be invoked, and it's way too easy to find out.
But it makes no sense at all: .NET FCL does it all, but in more legitimate way. Please see my answer.
—SA

RadXPictures 2-Jun-13 22:43pm

I checked these out, but I'm really looking for these calls to be made when a window maximize

Sergey Alexandrovich Kryukov 2-Jun-13 20:49pm

Instead, how about just reading FCL documentation with a bit more attention?
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-06-02T14:48:00

Solution 1

You don't need it. Avoid using P/Invoke unless it is absolutely unavoidable, as it will kill multi-platform compatibility of your application. The .NET FCL is quite enough for solving such problem. If, for example, you are using System.Windows.Forms, all you need is this:
http://msdn.microsoft.com/en-us/library/25w4thew.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.maximumsize.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.minimumsize.aspx[^].

—SA

Posted 2-Jun-13 14:48pm

Sergey Alexandrovich Kryukov

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RadXPictures 2-Jun-13 22:42pm

Okay, okay. I should probably specify a few things.

1. I am trying to change the minimum/maximum size of EXTERNAL apps (aka not my own application... ones that aren't even .NET for that matter)
2. I am trying to build an alternative shell for Windows specifically, so multiplatform compatible is not an issue for me. I don't care if it's Windows specific. It should be.

Sergey Alexandrovich Kryukov 2-Jun-13 23:37pm

Too late. These two notes were so critical, must more serious than your original question. Now you know how important is to pose your questions accurately. Don't blame me. :-)

However, P/Invoke of such operations is not a problem at all. Wait for another answer...

—SA

Sergey Alexandrovich Kryukov 2-Jun-13 23:45pm

Done. Please see Solution 2.

Enjoy.
—SA

Sergey Alexandrovich Kryukov · Answer 2 · 2013-06-02T17:44:00

[Answering after OP's clarification]

When you have the message ID WP_*, you need to P/Invoke, for your purpose, no more than the following Windows API functions:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644950%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644951%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644953%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644944%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644946%28v=vs.85%29.aspx[^].

Besides, you don't need to do it by yourself. It's all done for you already. Here:
http://www.pinvoke.net/default.aspx/user32.sendmessage[^],
http://www.pinvoke.net/default.aspx/user32/sendnotifymessage.html[^],
http://www.pinvoke.net/default.aspx/user32/SendMessageCallback.html[^],
http://www.pinvoke.net/default.aspx/user32/postmessage.html[^],
http://www.pinvoke.net/default.aspx/user32/postthreadmessage.html[^].

—SA