模拟Win7的组合键【Win+P】（切换显示器屏幕）

// 按下【LWIN】键keybd_event( VK_LWIN, 0x00, KEYEVENTF_EXTENDEDKEY | 0, 0 );//按下【P】键，扫描码0x50keybd_event( 0x50, 0x00, KEYEVENTF_EXTENDEDKEY | 0, 0 );//抬起【P】键，扫描码0x50keybd_event( 0x50, 0x00, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);//抬起【LWIN】keybd_event( VK_LWIN, 0x00, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);