Hover effect any1, plz help

I have attached a sample project, plz help me any1 by modifying the code to get a hover effect and when the mouse button is down and cursor is not over the button, i want it to revert back to the original image. Plz help

when the mouse button is down and cursor is not over the button??=Mouse is click on the form except on the button??
U can use:
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If X > cmdMain.Left And X < (cmdMain.Left + cmdMain.Width) Then
Exit Sub
End If

If Y < cmdMain.Top And Y > (cmdMain.Top + cmdMain.Height) Then
Exit Sub
End If

MsgBox "OK!Mouse is click on the form except on the button!"
End Sub