windows黑屏接口

1、黑屏API

static class Program
{
static SqlConnection connection;

private const int WM_SYSCOMMAND = 0x112;    //系统消息
private const int SC_SCREENSAVE = 0xf140;   // 启动屏幕保护消息
private const int SC_MONITORPOWER = 0xF170; //关闭显示器的系统命令
private const int POWER_OFF = 2;            //2 为关闭, 1为省电状态，-1为开机
private static readonly IntPtr HWND_BROADCAST = new IntPtr(0xffff); //广播消息，所有顶级窗体都会接收

[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);

static void Main()
{
    SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, POWER_OFF); // 关闭显示器
    // SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_SCREENSAVE, 0);           // 启动屏保
}
}

 

refurl:http://zhidao.baidu.com/question/371045320.html

 

2、DOS黑屏命令：

POWERCFG -Change -monitor-timeout-ac 5

 

这句话和调整显示器变黑是一样的，最低只能调到1分钟。

refurl:http://www.cnblogs.com/zzyn/archive/2009/08/06/1540241.html

 

2、软件锁屏代码：

 

public void testLockScreen() {
		try {
			Runtime.getRuntime().exec("RunDll32.exe user32.dll,LockWorkStation");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

 

refurl:http://blog.csdn.net/huoyin/article/details/2997060