e.g var mapinfo:variant; begin mapinfo := createoleobject('mapinfo.application'); end; How do i free the memory finally? thanx

mapinfo := nil;

thans for your reply It still doesnt work. it raises an exception :[Error] Incompatible types: 'Variant' and 'Pointer' when i add mapinfo := nil in the formdestroy event. I cant understand what the function of nil command is. Is it only used to free the pointer? Thanx

http://delphi.ktop.com.tw/topic.php?topic_id=44688