SendMessage函数/ SC_MONITORPOWER无法开启监控运行Windows 8时ON [英] SendMessage/SC_MONITORPOWER won't turn monitor ON when running Windows 8

问题描述

我把我的显示器和关闭使用以下code：

I turn my monitors on and off by using the following code:

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

private const int WM_SYSCOMMAND = 0x0112;
private const int SC_MONITORPOWER = 0xF170;
private const int MonitorTurnOn = -1;
private const int MonitorShutoff = 2;

//Turn them off
SendMessage(f.Handle, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)MonitorShutoff);

//Turn them on
SendMessage(f.Handle, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)MonitorTurnOn);

此作为旨在工作，但在安装Windows 8后（我认为这是什么原因，因为我看到别人有同样的问题）上是行不通的打开屏幕。我仍然可以将其关闭，但不管多少次，我跑与MonitorTurnOn SendMessage函数（），我还是要移动鼠标或preSS一键搞定显示器回去。

This used to work as intended, but after installing Windows 8 (I assume this is the reason, since I see others have the same issue) turning the screen on won't work. I can still turn it off, but no matter how many times I run SendMessage() with MonitorTurnOn, I still have to move the mouse or press a key to get the monitors back on.

这是如何使Windows 8的这项工作有什么建议？

Any suggestions on how to make this work on Windows 8?

推荐答案

我有同样的问题，我找到了解决方法是移动鼠标：

I had the same problem, the solution I found is to move the mouse :

mouse_event(MOUSEEVENTF_MOVE, 0, 1, 0, NULL);
Sleep(40);
mouse_event(MOUSEEVENTF_MOVE, 0, -1, 0, NULL);

它会唤醒显示器。
Earlypearl

It will wake the monitor on. Earlypearl

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