need help in raising events

Question

hi! I'm just new in programming in vb.net. I have a user control that raises an event which is handled by the form where the control is loaded. the user control and the form are located in two separate projects and the control is loaded dynamically. This is my code for the user control: Public Delegate Sub ClearAllControls(ByVal bytIQAType As Byte) Public Class ctlControl Inherits System.Windows.Forms.UserControl Public Event ClearAllCtrls As ClearAllControls Private Sub btnClearAll_Click(ByVal sender As Object ByVal e As System.EventArgs) Handles btnClearAll.Click Try RaiseEvent ClearAllCtrls(bytIQAType) Catch ex As Exception Call MsgBox(ex.Message) End Try End Sub End Class This is my code for the form: Public Class frmForm Inherits System.Windows.Forms.Form Public WithEvents ctlCtrl as prjControl.ctlControl Public Sub ctlCtrl_ClearAllCtrls(ByVal bytIQAType As Byte) Handles ctlCtrl.ClearAllCtrls Try 'call clear all of all loaded controls Catch ex As Exception call MsgBox(ex.Message) End Try End Sub End Class My problem is that when RaiseEvent is called it doesn't go to the ctlCtrl_ClearAllCtrls method in frmForm and just moves on to End Try. No error or exception occurs so I don't know what the problem is. Need help pls!

MythicalMe · Answer

Events don't necessarily act like subs or functions. When you raise an event it goes into the event queue. If you're using the debugger and stepping through the code the event is being held and may never get executed. I always work backward when debugging events. First I set a breakpoint within my event and this way I know that the breakpoint event of the debugger is not holding the event queue before my event fires. If my event doesn't get triggered then I know that the problem lies elsewhere. You're confusing events and delegates anyhow. You use a delegate to create a handler for an event. As the event is already being handled by the click event you don't need the delegate. Bottom line here is that all you need to do is declare your event: Public Event ClearAllCtrls(ByVal bytIQAType as Byte)