How to Close a Dialog Box in MFC Using EndDialog Function

Learn how to properly close a dialog box in MFC applications using the EndDialog function with IDOK or IDCANCEL return codes.

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To close a dialog box in MFC, you typically use the `EndDialog` function within your dialog class. Calling `EndDialog(IDOK)` will close the dialog box and return `IDOK` as the dialog result. For example, if you have a button mapped to an event handler in your dialog, adding `EndDialog(IDOK);` within that handler will close the dialog when the button is clicked. It's essential to use the correct dialog return code (`IDOK`, `IDCANCEL`, etc.) to ensure your application behaves as expected.

FAQs & Answers

  1. What does the EndDialog function do in MFC? The EndDialog function closes a modal dialog box and returns a specified result code such as IDOK or IDCANCEL to signal how the dialog was closed.
  2. How do I handle button clicks to close a dialog in MFC? You map the button click event to an event handler in your dialog class and call EndDialog with an appropriate return code like EndDialog(IDOK) inside the handler to close the dialog.
  3. What are common return codes used with EndDialog in MFC? Common return codes include IDOK for OK confirmation and IDCANCEL for canceling, which help the application determine the user's action on the dialog.

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