CancelButton Property of the Form

Question

I'm doing a classic Windows Application in C#, I just want to add a record in a Table. Well, I Have a form with several TextBoxes and six Buttons: 'Add', 'Delete', 'Search', 'Cancel', 'Save' and 'Exit'. Initially, the TextBoxes are not enabled, when I click 'Add' they are enabled, when I click 'Cancel' they are not enabled again. So, I want when the TextBoxes are Enabled and I press Esc (The Esc key of the keyboard) the TextBoxes are not enabled like I had clicked Cancel. Then, tried set the CancelButton property of the form to 'btnCancel' (btnCancel is the name of the Cancel Button), but when a press Esc the form is closed and I don't want that because a I've a Exit Button. Somebody can help me. What can I do? Thanking you in advance.

Carlos Sanchez · Answer

Thank you Mike, but I wrote the next code and when I press Escape the form is closed yet. protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { const int WM_KEYDOWN = 0x100; const int WM_SYSKEYDOWN = 0x104; if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN)) if (keyData==Keys.Escape && this.btnGuardar.Enabled) { //Code to set the TextBoxes no enabled } } I wrote WM_KEYDOWN n' WM_SYSKEYDOWN as consts because an error is ocurred with them. I found the values in the web. if you or somebody know the solution write it please.

jcity444 · Answer

First of all, I hope you are only designing this for yourself, because Cancel and Escape should always dismiss the dialog if you are going to adhere to standards and other people are going to understand your application when they use it. Exit should appear as a menu item as well. If you must do what your are saying, try overriding the command key. For example, here is how you would override tab behavior in a dialog. If you replace Keys.Tab wit Keys.Escape, then you can decide what you want to do with the escape (if anything): protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { // check if the message is a keydown or a system key down if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN)) { switch (keyData) { case (Keys.Tab | Keys.Control): // shift the edit field left MoveCellTab(false); break; case Keys.Tab: // shift the edit field right MoveCellTab(true); break; default: break; } } -Mike G.

CancelButton Property of the Form

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