if typeof sender is radioButton then
if ctype(sender, RadioButton).Checked = True Then
if ctype(sender, RadioButton).Name.Equals("RadioButton1", StringComparison.InvariantCultureIgnoreCase)  then
....
....
else if ctype(sender, RadioButton).Name.Equals("RadioButton2", StringComparison.InvariantCultureIgnoreCase) then
....
....
else if ctype(sender, RadioButton).Name.Equals("RadioButton3", StringComparison.InvariantCultureIgnoreCase) then
....
....
end if
end if
end if