Hi Wilson, Assuming you're using Visual C++, try this: cd to "Program Files" directory and then cd to devstudio\vc\bin and run vcvars32.bat You may also need to edit/create entries in autoexec.bat (for Windows 95/98) or in Control Panel -> System -> Environment (for Win NT) to set your INCLUDE, LIB, MSDevDir, and PATH -- make sure these environment variables are set correctly. --Marcia