you need a bit of vba code behind the afterupdate event of your radio button group. each radio button defaults to a number (which you can change when creating the control) which for the sake of argument will say are 1 and 2
you can do this in a number of ways
1. heavy on the code
Code:
if radiobuttongroup=1 then
ctrl1.visible=true
ctrl2.visible=false
else
ctrl1.visible=false
ctrl2.visible=true
end if
2. light on the code
Code:
ctrl1.visible=radiobuttongroup=1
ctrl2.visible=radiobuttongroup<>1
3. the above two methods mean changes to the code if you add another control, this next method requires no changes to the code, just populate the tag property of each control you want to set the visibility - 1 for radio option 1, 2 for radio option 2, leave blank for all other controls
Code:
dim ctrl as control
for each ctrl in me.controls
ctrl.visible=ctrl.tag=radiobuttongroup or ctrl.tag=""
next ctrl