How to "call" and event

Works great. Thanks

Call YOUR event handler, not system handler: myTextBox.myTextBox_Validating(this,...); But, You can call system handler after creating Your own control inherited from TextBox. Next, create a new method calling OnValidating() etc. methods in it: public class VTextBox: TextBox { public void UnconditionalValidating() { System.ComponentModel.CancelEventArgs e=new System.ComponentModel.CancelEventArgs(...); this.OnValidating(e); ... } }

How do I find the event handler for a system event? Do you have a code sample I could use as a guide?

Call Your event handler, not event.

There's probably a direct way of doing it but I don't know it offhand. A quick and dirty way would be to set the focus to the textbox in the button click event and then set the focus right back to the button. It might do the trick.