error C2065: 'ShowStr' : undeclared identifier
error C2065: 'WM_SETMESSAGESTRING' : undeclared identifier
error C2653: 'CMainFrame' : is not a class or namespace name
error C2373: 'ShowStr' : redefinition; different type modifiers
error C2440: 'type cast' : cannot convert from 'class CString' to 'long'