Question for passing object as function parameter

Help me!
I wonder how can I passing an object as function/sub parameter
since the procedure call always think my object as its default property/method

example:

Dim objectRef as MyObject
set objectRef = new MyObject
showObjectInfo(objectRef) 'Here it thinks objectRef as its default property

sub showObjectInfo(oR as MyObject)
oR.x = 1
oR.y = 2
end sub

help me and send me mail([email protected])
thanx a lot