Command Click

How can I say- On Command4_Click MsgBox "Ok"-?
Ex: when the user clicks Command4 a labels width changes, but when the labels width = "455" then on the next click on Command4, a message box will pop up. How do i do that???
:confused:

VB Code:

Private Sub Command4_Click()
 
If Label1.Width >= 455 Then
    MsgBox "OK"
    Exit Sub
End If
 
Label1.Width = Label1.Width + 1
 
End Sub