VB Script problem

HONSUM

我想寫個VB SCRIPT o係active directory行,  不過想只行一次, 因為行多一次會出ERROR, 可唔可以O係SCRIPT度加D CHECKING去CHECK部PC行左未, OR HIDDEN左個ERROR MESSAGE? THANKS!

SCRIPT:
strComputer = "."
Set objadmins = GetObject("WinNT://" & strComputer & "/Remote Desktop Users")
Set objgroup = GetObject("WinNT://DC/GROUP")
objadmins.Add(objgroup.ADsPath)