i use vb 6 in Xp pro, i realize that my calendar control doesn't work, it will crash everytime i try to use that control. i also try to use vb 6 in xp pro without service pack, vb6 crash sometime. i wonder if installing service pack 1 for xp will help or if there is a service pack for vb 6 will resolve this issue. the same machine, in windows 2000 environment, calendar control, etc works. however, when i upgrade to later service pack, it got me the same problem like XP.