声明外部函数:
PUBLIC FUNCTION ulong GetPixel(ulong hdc,ulong x,ulong y) LIBRARY "gdi32.dll"
PUBLIC FUNCTION ulong SetWindowRgn(ulong hWnd,ulong hRgn,boolean bRedraw) LIBRARY "user32.dll"
PUBLIC FUNCTION ulong CreateRectRgn(ulong X1,ulong Y1,ulong X2,ulong Y2) LIBRARY "gdi32.dll"
PUBLIC FUNCTION ulong CombineRgn(ulong hDestRgn,ulong hSrcRgn1,ulong hSrcRgn2,ulong nCombineMode) LIBRARY "gdi32.dll"
PUBLIC FUNCTION ulong SendMessage(ulong hwnd,ulong wMsg,ulong wParam,ulong lParam) LIBRARY "user32.dll" ALIAS FOR "SendMessageA"
PUBLIC FUNCTION ulong ReleaseCapture() LIBRARY "user32.dll"
PUBLIC FUNCTION ulong DeleteObject(ulong hObject) LIBRARY "gdi32.dll"
PUBLIC FUNCTION ulong GetDC(ulong hwnd) LIBRARY "user32.dll"