Well the compiler is correct, Checked is not a member of the Control class, so can't use it. But instead what you can do is this
VB Code:
  1. Dim rbTemp As RadioButton
  2.         For Each MPrd1 As Control In Me.Controls
  3.             If TypeOf MPrd1 Is RadioButton Then
  4.                 rbTemp = MPrd1
  5.                 rbTemp.Checked = False
  6.             End If
  7.         Next