windows自带的画笔程序的hook的例子。dll为hookdll的工程，project1为app的工程。运行时，先运行画笔程序，在画笔程序中按F10，就会自动画画。-windows built-in brush hook procedure example. dll for hookdll works, project1 for the app works. Run-time, first run the brush procedures, procedures in the brush b