The SetWindowOrgEx function specifies which window point maps to the viewport origin (0,0). BOOL SetWindowOrgEx( HDC hdc, // handle to device context int X, // new x-coordinate of window origin int Y, // new y-coordinate of window origin LPPOINT lpPoint // original window origin ); The SetViewportOrgEx function specifies which device point maps to the window origin (0,0). BOOL SetViewportOrgEx( HDC hdc, // handle to device context int X, // new x-coordinate of viewport origin int Y, // new y-coordinate of viewport origin LPPOINT lpPoint // original viewport origin );一个是设备,一个是窗口!
设置设备坐标原点
HDC hdc, // handle to device context
int X, // new x-coordinate of window origin
int Y, // new y-coordinate of window origin
LPPOINT lpPoint // original window origin
);
The SetViewportOrgEx function specifies which device point maps to the window origin (0,0). BOOL SetViewportOrgEx(
HDC hdc, // handle to device context
int X, // new x-coordinate of viewport origin
int Y, // new y-coordinate of viewport origin
LPPOINT lpPoint // original viewport origin
);一个是设备,一个是窗口!
cyClient=HIWORD(lParam);这个哪来的
设计设备坐标原点时,以后所用的GDI函数是否用设备参数还是逻辑参数