Just started a C++ class after taking a C class. Now I'm having trouble adding units(.cpp + .h) in C++ professional. I simply select new unit in my project and wrote the require code for the header and implementation file. Unfortunately, when I try to run it I get "Unable to open include file 'XXXX.h' " error for my tets main. I'm seeing all the required files in the same directories created by Professional. Does I need to place these in other dirs? Sorry about the basic question, thanks in advance.