hi, I am trying to compile a vc6.0 project in vc8.0. I am getting the following error. error C2061: syntax error : identifier 'THIS' I tried to use #undef THIS and #define THIS. But it didnt work. Is it possible that old windows files are getting linked. In that case as well the definition of 'THIS' hasn't changed and its the same. Can anyone suggest a fix? regards, sk80.