This is the hook if you ever wanted to retrieve the value that you've set. Say you wanted all form elements to use the same background color that you set your user control. You could set the color of your user control to red, enumerate over all other controls on the form, and "Set" their background color from the "Get" of your User control.
In all reality, if you wanted to limit it to "Set Only" you could change it the property to WriteOnly but then your loosing the ability to get the value realtime.
Code:
Public Class UserControl1
Public WriteOnly Property TextBoxBackgroundColor() As Color
Set(ByVal value As Color)
TextBox1.BackColor = value
TextBox2.BackColor = value
TextBox3.BackColor = value
TextBox4.BackColor = value
TextBox5.BackColor = value
End Set
End Property
End Class