I have two . files cpp/h from another project that I added to my current project.. the problem is when I compile the project, those files gives error message. It seems that the compiler doesn''t recognize NULL, HRESULT, etc ??? but the weird thing is only for those new files that I''ve just added, other files (in the same project) who have been using the same syntax, compiled just fine.. This is really bugging me, I''ve been experiencing some common difficulties using VC but never like this.. and I''ve done this before but never had any these problems.. Can somebody help me pleaseee..

Close your project and try deleting the .ncb file in your project/workspace directory.

It''ll rebuild itself. (or just rename it to .bak or something) then reopen. I''ll be watching. let moe know if that works for you.

I had the prob where the drop down dialogs for member classes woouldn''t work. Deleted the ncb file and viola!

The problem is solved by including stdafx in the header files.. which is quite weird because I don''t have to do it in other files ??
somebody know why ??

ps : thx for the tip though.. but it didn''t work