c# - How to Close Child Window Using Alt + F4 Key? -

alt + f4 shortcut close form. when use shortcut in mdi enviroment, application closed, shortcut applies 'container' , not 'childform'.

what best practice capture event , close active child instead of container

i read registering alt + f4 hotkey when mdi activates. when mdi deactivates, unregistering hotkey. so,the hotkey doesn't effect other windows.

someone, can tell registering alt + f4 or better

you can change void dispose(bool disposing) method in winform close child form instead, this:

protected override void dispose(bool disposing) {     if (/* need close child form */)     {         // close child form, maybe calling dispose method     }     else     {         if (disposing && (components != null))         {             components.dispose();         }         base.dispose(disposing);     } } 

edit: commenter said, instead of modifying overridden dispose method, should override onformclosing method instead, so:

protected override void onformclosing(formclosingeventargs e) {     if (/* need close child form */)     {         e.cancel = true;         // close child form, maybe childform.close();     }     else         base.onformclosing(e); }