！一个主机可以接两个投影仪,让两个投影仪各显示屏幕的一半

求助！！一个主机可以接两个投影仪,让两个投影仪各显示屏幕的一半?
如题

[解决办法]
call 多屏 api
EnumDisplayMonitors Enumerates display monitors that intersect a region formed by the intersection of a specified clipping rectangle and the visible region of a device context. 

GetMonitorInfo Retrieves information about a display monitor. 
MonitorEnumProc An application-defined callback function that is called by the 
EnumDisplayMonitors function. 

MonitorFromPoint Retrieves a handle to the display monitor that contains a specified point. 
MonitorFromRect Retrieves a handle to the display monitor that has the largest area of intersection with a specified rectangle. 

MonitorFromWindow Retrieves a handle to the display monitor that has the largest area of intersection with the bounding rectangle of a specified window.