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Mar 6th, 2009

How can i prevent Alt+F4, closing a dialog?

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How can i prevent a dialog closing by Alt+F4 ?
I am using PreTranslateMessage(),,,,what is the Virtual key #define for Alt+F4 or is there any other way?,,,,thank you

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risa

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Mar 6th, 2009

Re: How can i prevent Alt+F4, closing a dialog?

It's a combination of the F4 key code combined with the alt modifiers, you need to check both.

But i'd avoid trying to prevent it if I was you....

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Re: How can i prevent Alt+F4, closing a dialog?

If I remember correctly, Alt+F4 never reaches PreTranslateMessage()

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Re: How can i prevent Alt+F4, closing a dialog?

Here's the list of virtual key codes. jencas makes a good point that I was wondering about myself. Still, give it a try and let us know what happens.

nucleon

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Re: How can i prevent Alt+F4, closing a dialog?

Click to Expand / Collapse Quote originally posted by risa ...

How can i prevent a dialog closing by Alt+F4 ?
I am using PreTranslateMessage()

Instead of PreTranslateMessage(), add a handler for WM_SYSCOMMAND and detect SC_CLOSE.

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Re: How can i prevent Alt+F4, closing a dialog?

You sure it's not WM_CLOSE?

Comatose

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Re: How can i prevent Alt+F4, closing a dialog?

Click to Expand / Collapse Quote originally posted by Comatose ...

You sure it's not WM_CLOSE?

Yes, SC_CLOSE comes with WM_SYSCOMMAND.

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Re: How can i prevent Alt+F4, closing a dialog?

Seems pretty simple to me, add this to the dialog message procedure, and windows shouldn't handle the ALT-F4.

C++ Syntax (Toggle Plain Text)

case WM_SYSKEYDOWN: break;

Last edited by William Hemsworth; Mar 6th, 2009 at 12:22 pm.

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Re: How can i prevent Alt+F4, closing a dialog?

Click to Expand / Collapse Quote originally posted by William Hemsworth ...

Seems pretty simple to me, add this to the dialog message procedure, and windows shouldn't handle the ALT-F4.
C++ Syntax (Toggle Plain Text)
case WM_SYSKEYDOWN: break;
case WM_SYSKEYDOWN: break;

Hmm .. that renders the system menu completely ineffective, which is probably not what the OP wants.

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