VB.NET AddHandler to each button control while looping through controls

Question

I am trying to add mouseenter and mouseleave events to each button while I'm looping through the controls like:

For each control in me.controls
       With control
            If TypeName(control) = "Button" Then
                AddHandler control.MouseEnter, AddressOf control.DynamicButton_MouseEnter
                AddHandler control.MouseLeave, AddressOf control.DynamicButton_MouseLeave
            end if
next

And it says "MouseEnter is not an event of object". So I wonder how do I reference the dynamic button?

Answer 1

You can try fetching only the Buttons on the form.
Should cause the control to be of the correct type for attaching a handler.

   Private Sub AddButtonEvents()

        For Each control In Me.Controls.OfType(Of Button)
            AddHandler control.MouseEnter, AddressOf DynamicButton_MouseEnter
            AddHandler control.MouseLeave, AddressOf DynamicButton_MouseLeave
        Next

    End Sub

Or you can loop as you already are doing, and cast as follows

    Private Sub AddControlHandlers()

        For Each control In Me.Controls

            If TypeName(control) = "Button" Then

                AddHandler DirectCast(control, Button).MouseEnter, AddressOf DynamicButton_MouseEnter
                AddHandler DirectCast(control, Button).MouseLeave, AddressOf DynamicButton_MouseLeave

            End If

        Next

    End Sub