C# 从Powershell调用user32.dll中的keybd_事件

我正试图阻止屏幕保护程序启动。 我尝试过发送击键，但它们都需要按标题抓取一个窗口。 如果桌面上没有打开的窗口，就没有什么可抓取的

所以我找到了一些可能有效的方法，但我不是C#wizard。 这是基于

下面的代码应该发送1，但我遗漏了一些东西。在从Powershell调用新类型之前，我不会收到任何错误。 之后，我想让它发送一个F15重置屏幕保护程序倒计时，但不修改屏幕上的东西。（但我必须先通过发送1来爬网）

---

似乎您在该类型定义中缺少了一些使用-语句的

：

Add-Type @"
using System;
using System.Threading;
using System.Runtime.InteropServices;

namespace ConsoleApplication1 
{
    public static class PressKeyForMe 
    { 
        [DllImport("user32.dll")] 
        static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);

        //public static void Main(string[] args)
        public static void Main()
        {            
            //This code will press and hold the '1' button for 3 secs, and then will release for 1 second
            //VK_F15 0x7E
            keybd_event((byte)0x31, (byte)0x02, 0, UIntPtr.Zero);
            Thread.Sleep(3000);

            keybd_event((byte)0x31, (byte)0x82, (uint)0x2, UIntPtr.Zero);
            Thread.Sleep(1000);
        }
    }

}
"@

现在应该可以这样做了：

[ConsoleApplication1.PressKeyForMe]::Main()


您还可以只添加方法，并将自动生成的类型分配给变量：

$KeyPresser = Add-Type -MemberDefinition @"
[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);

public static void PressOne(int press, int release)
{
    //This code will press and hold the '1' button for 3 secs, and then will release for 1 second
    //VK_F15 0x7E
    keybd_event((byte)0x31, (byte)0x02, 0, UIntPtr.Zero);
    Thread.Sleep(press);

    keybd_event((byte)0x31, (byte)0x82, (uint)0x2, UIntPtr.Zero);
    Thread.Sleep(release);
}

public static void PressOne()
{
    PressOne(3000, 1000);
}
"@ -Name PressKeyForMe -UsingNamespace System.Threading -PassThru

现在，您可以在不使用完整类型名的情况下调用该方法：

PS C:\> $KeyPresser::PressOne() 
PS C:\> $KeyPresser::PressOne(400,120) # you really need to press 3 seconds?

谢谢Mathias修复了我上面的代码。我能够完成我的脚本

对于好奇的人来说，下面是我是如何让F15钥匙工作的。
只需每隔几分钟使用一次[ScreenSpender.PressKeyForMe]：：Main（）

，即可让屏幕保护程序停止运行。 感谢John Savard在键盘扫描代码方面的帮助

#The following is an attempt to prevent the SceenSaver from kicking-in during installation
#We call it using this
#[ScreenSpender.PressKeyForMe]::Main()

Add-Type @"
using System;
using System.Threading;
using System.Runtime.InteropServices;

namespace ScreenSpender 
{
    public static class PressKeyForMe 
    { 
        [DllImport("user32.dll")] 
        static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);

        //public static void Main(string[] args)
        public static void Main()
        {
            //bScan = PS/2 scan code. (We happen to be using Set 1)
            // Make  = when you press the key
            // Break = when you release the key
            //VK_F15 0x7E
            //SC_F15 0x5D   (Scan code set 1) (or 0x64) (http://www.quadibloc.com/comp/scan.htm  - by John Savard)
            //private const int KEYEVENTF_KEYUP = 0x02;
            //This code will press and hold the 'F15' key for 250 Milliseconds, and then will release for 200 Milliseconds
            keybd_event((byte)0x7E, (byte)0x5D, 0, UIntPtr.Zero);
            Thread.Sleep(250);

            // Release for 200 Milliseconds
            keybd_event((byte)0x7E, (byte)0x5D, (uint)0x2, UIntPtr.Zero);
            Thread.Sleep(200);
        }
    }
}
"@

---

谢谢你，马蒂亚斯！这很有效。不，我不需要按住那把钥匙3秒钟。我只是不确定在事情破裂之前我能改变什么。@Mr.Cool:）如果这解决了你的问题，请点击左边的复选标记，将答案标记为“接受”。我正在寻找一个大的绿色框，上面写着“接受此解决方案”，大约一个月。。

#The following is an attempt to prevent the SceenSaver from kicking-in during installation
#We call it using this
#[ScreenSpender.PressKeyForMe]::Main()

Add-Type @"
using System;
using System.Threading;
using System.Runtime.InteropServices;

namespace ScreenSpender 
{
    public static class PressKeyForMe 
    { 
        [DllImport("user32.dll")] 
        static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);

        //public static void Main(string[] args)
        public static void Main()
        {
            //bScan = PS/2 scan code. (We happen to be using Set 1)
            // Make  = when you press the key
            // Break = when you release the key
            //VK_F15 0x7E
            //SC_F15 0x5D   (Scan code set 1) (or 0x64) (http://www.quadibloc.com/comp/scan.htm  - by John Savard)
            //private const int KEYEVENTF_KEYUP = 0x02;
            //This code will press and hold the 'F15' key for 250 Milliseconds, and then will release for 200 Milliseconds
            keybd_event((byte)0x7E, (byte)0x5D, 0, UIntPtr.Zero);
            Thread.Sleep(250);

            // Release for 200 Milliseconds
            keybd_event((byte)0x7E, (byte)0x5D, (uint)0x2, UIntPtr.Zero);
            Thread.Sleep(200);
        }
    }
}
"@