Les,
You are totally right. I forgot about the EnumComputerIngroups() function I posted
 Code:
Dim $Groups, $Group
$Groups = EnumComputerIngroups(1)
For Each $Group in $Groups
	? $Group
Next
If Ascan($Groups,'MySecurityGroup') > -1
	? 'Yes'
Else
	? 'No'
EndIf