I have been using an activeX control (Ariad LstBoxX5.ocx) for weeks in an application for my personal use. Yesterday when I tried to open this project I got an error, and in a log file put out by VB, I got the message "Cannot load control ListFolders". Looked at the project components list and it looked OK. Found that even in a brand new executable program with lstbox as the only component, when I try to add the lstbox to a form I get the error message "Class not registered" Looking for class with object CSLID "B2988E36-6177-4308-98CE-9931FE6E63EE". Tried regsrv32.exe unreg and reg, but it did not help. My program also uses another control from the same company (Ariad Explorer activeX control), and it seems to have not problems. Tried unuistalling and reinstalling the listbox, but it didn't help. Would really like to understand this. Help!