Thread: Error in tutorial?

I've been looking at the tutorials at http://www.32bits.co.uk/ and i tried to compile the first program and i get errors:

41 c:\windows\desktop\window.cpp
ANSI C++ forbids implicit conversion from `void *' in argument passing

63 c:\windows\desktop\window.cpp
ANSI C++ forbids implicit conversion from `void *' in argument passing

The actual lines of code are here:

41:

Code:

HWMD hWnd = CreateWindow(strAppname, strAppname, WS_OVERLAPPEDWINDOW, 100, 100, 640, 480, NULL, NULL, wc.hInstance, NULL );

63:

Code:

UnregisterClass( strAppname, wc.hInstance );

I think it has to do with strAppname, I get what the error is, but I don't know how to fix it. Any Help?