CODEWITHSUNDEEP
cwindowswinapimessagebox
Lynnooi
Lynnooi

Reputation: 199

How can I cause my MessageBox to pop up on top of all forms?

I am currently providing information to the user with a message box in my C program, but the message box is appearing behind all other forms of my application.

How can I bring it forward so that it appears in front of all my forms, or set its parent?

Here is the code I'm currently using to show the message box:

MessageBox(0,error_msg, "Error - No Algorithm", MB_OK );

Upvotes: 1

Views: 2844

Answers (3)

Peter
Peter

Reputation: 1

Late to this but just search for the window by class or title using FindWindow and supply that HWND as the first parameter to MessageBox.

Upvotes: 0

Cody Gray
Cody Gray

Reputation: 244732

The reason it's appearing behind all forms now is because you've not specified an owner window. That causes it to appear directly on top of the desktop window. The problem is that your other windows are already covering up the desktop window, so they blissfully continue to cover up your message box, too.

The solution, as you suspect, is to specify one of your windows as the owner for the message box. You do that by specifying their window handle (HWND) as the first argument to the function:

MessageBox(hWnd,                    // the window handle for your owner window
           error_msg,               // the message to be displayed
           "Error - No Algorithm",  // the title
           MB_OK);                  // flags indicating contents and behavior

The documentation provides additional information.

Upvotes: 2

paulcam
paulcam

Reputation: 904

The first parameter to MessageBox is the HWND to parent to. 0 or NULL means "no parent", so the resulting message box will not be modal. You need to supply the parent HWND to get the behavior you want.

Upvotes: 0

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