C#
private const int WM_SYSCOMMAND = 0x0112;private const int SC_MONITORPOWER = 0xF170;private const int MONITOR_ON = -1;private const int MONITOR_OFF = 2;/// <summary>/// 关闭显示器/// </summary>public static void Off(){ SendMessage(0xffff, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_OFF);}/// <summary>/// 关闭显示器/// </summary>public static void On(){ SendMessage(0xffff, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_ON);}[DllImport("user32.dll")]public static extern int SendMessage(int hWnd, int hMsg, int wParam, int lParam);
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