OptionButton 

• OptionButton controls are used in an option group to display options from which the user selects only one. 
  
• OptionButton controls are grouped by placing them inside a container such as a Frame control, a PictureBox control, or a Form. 
  
• All OptionButton controls within the same container act as a single group. 
  
• When a user selects an OptionButton, the other OptionButton controls in the same group are automatically unavailable. 
  
• To specify one OptionButton as the default, set the Value property to True at design time.

The following form shows two option buttons grouped in a frame.

Option buttons have the value True or False.  To check the value of an option button in a Select Case statement use code like:

Select Case True
     Case optReserved.Value
          Call bookReserved ( theater( ), availableSeats )
     Case optGeneral.Value
          Call bookGeneral ( theater( ), availableSeats )
End Select

The values can also be checked in an If statement.