I attempted to enter the program in chapter 7. I was able to compile and link the code but receive a :

First-chance exception in OFWIN.exe (USER32.DLL): 0xC0000005: Access Violation.
The program 'C:\Program Files\Microsoft Visual Studio\MyProjects\OFWIN\Debug\OFWIN.exe' has exited with code 0 (0x0).

when the program tries to execute the:

RegisterClass(&WindowClass);

line. Does anyone know how I can fix this?

Never mind I found my problem was that I left out the line defining the

menu:WindowClass.lpszMenuName = 0; //menu name... no menu

adding this line corrected the problem