[ros-diffs] [fireball] 23330: Add message's spy into user32.dll. In order to enable, just uncomment #define YDEBUG in spy.c file and optionally set the messages you want to include / exclude in the registry (HKCU\ReactOS\Debug). When it's turned off (YDEBUG is not defined), it doesn't provide any slow-down to the system. DefWindowProc() functions are slightly refactored to have one exit point instead of numerous returns in a switch-case statement. FIXME: maybe DPRINTs will be changed to DbgPrint because it'