Passing Forms to Procedures

You can pass forms to procedures just as you would any object. Here, we've set up a Sub procedure, ColorWindowRed, to turn the background color of a form to red using the Form BackColor property:

Sub ColorWindowRed(ByVal FormToColor As Form)
    FormToColor.BackColor = System.Drawing.Color.Red
End Sub

This is a good technique to know if you want to coordinate between forms in a multiform application.