Raise Event From Sub Class?

I have 2 classes one main class called Mygrid and another class inside it called TLBoxEditingControl which inherits a textbox into grid cell.Also I have added one Listbox called LstBox to the usercontrol MyGrid.

1) Initially its visible is false. How can i make visible true in TLBoxEditingControl class.

2) I have an Event called MyList() in Main Class, how can I raise this event in TLBoxEditingControl class.

Here is the code i use, This is not working please expalin

Public Class MyGrid
Inherits DataGridView
Public Event MyList()

[code]....

I have added this control to a form and added this code

Private Sub MyGrid1_MyList() Handles MyGrid1.MyList
MsgBox("ggg")
End Sub

Here the event is not raising.