How to hide "Add to Cart" Button for special shoppergroups?

[IllusionStudio]

Especially I need to hint the button for unregistered users.

Thanks for your help.

[jjk]

I suppose you want to "hide" the button for unregistered users.
See here: http://forum.virtuemart.net/index.php?topic=91385.msg300478#msg300478

[IllusionStudio]

Oh for sure i want to hide.  Sorry.

The link you have posted is about the same problem and unfortunately not solved.   

[jjk]

...but it contains two hints how to solve it 
Also you can set up the cart so that unregistered users are forced to register first before they are able to click on "confirm order".