You can check if a radio button is selected or not with the Checked property (formerly the Value property in VB6 and earlier). Radio buttons' Checked property only has two settings: True if the button is selected, and False if not.
Here's an example showing how to determine whether a radio button is selected or not. In this case, we display a message in a message box that indicates if a radio button, RadioButton1, is selected or not:
Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click If RadioButton1.Checked Then MsgBox ("The Radio Button is selected.") Else MsgBox ("The Radio Button is not selected.") End If End Sub
And that's all there is to it.