Question

我希望捕获有人使用 Ctrl C ，即使在焦点偏离时也是如此。即时通讯使用Visual Basic 2010。

Answer 1

好的，所以我有一个解决方案，我验证了工作。你需要一个C＃库，需要一些额外的工作，但不多。创建一个C＃类库并添加一个名为“MyHooks”的类，并添加对System.Windows.Forms.dll和我链接到的库的引用。您将使用它的主程序将引用此C＃库和System.Windows.Forms。

namespace HookManager.Interface {
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Gma.UserActivityMonitor;
using System.Windows.Forms;

public static class MyHooks {

    public static void HookControlC(KeyEventHandler keyDown, KeyEventHandler keyUp) {
        HookManager.KeyDown += keyDown;
        HookManager.KeyUp += keyUp;
    }

}
}

现在你的程序可以做类似的事情：

Imports hookmanager.interface
Imports System.Windows.Forms

Module Module1

Sub Main()
    MyHooks.HookControlC(AddressOf ControlC_KeyDown, AddressOf ControlC_KeyUp)

    While True
        Application.DoEvents()
    End While
End Sub

Private m_ControlKeyPressed As Boolean = False

Private Sub ControlC_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)
    If e.KeyValue = 162 OrElse e.KeyValue = 163 Then
        m_ControlKeyPressed = True
    End If
    If m_ControlKeyPressed Then
        If e.KeyCode = Keys.C Then
            Console.WriteLine("You captured, control c!")
            Console.WriteLine(Clipboard.GetText())
        End If
    End If
End Sub

Private Sub ControlC_KeyUp(ByVal sender As Object, ByVal e As KeyEventArgs)
    If m_ControlKeyPressed Then
        If e.KeyValue = 162 OrElse e.KeyValue = 163 Then
            m_ControlKeyPressed = False
        End If
    End If
End Sub

End Module

Answer 2

您需要创建一个低级别的钩子。 This CodeProject example非常完美，我自己也用它来学习。我稍微修改了代码，但这里有一个简单的例子，说明你可以用这个库做些什么。同样，这只是一个示例，可能无法反映最终代码，但可以轻松修改以捕获Control + C，并且库已有详细记录。

   private static bool m_ControlKeyPressed = false;

   private static void ControlC_KeyDown(object sender, KeyEventArgs e) {
        if (e.KeyValue == 162 || e.KeyValue == 163) {
            m_ControlKeyPressed = true;
        }
        if (m_ControlKeyPressed) {
            if (e.KeyCode == Keys.C) {
                e.SuppressKeyPress = true; // Suppress, or do something with it
            }
        }
    }

    private static void ControlC_KeyUp(object sender, KeyEventArgs e) {
        if (m_ControlKeyPressed) {
             if (e.KeyValue == 162 || e.KeyValue == 163) {
                m_ControlKeyPressed = false;
            }
        }
    }

转换为Vb.Net

Private Shared m_ControlKeyPressed As Boolean = False

Private Shared Sub ControlC_KeyDown(sender As Object, e As KeyEventArgs)
    If e.KeyValue = 162 OrElse e.KeyValue = 163 Then
        m_ControlKeyPressed = True
    End If
    If m_ControlKeyPressed Then
        If e.KeyCode = Keys.C Then
            e.SuppressKeyPress = True
        End If
    End If
End Sub

Private Shared Sub ControlC_KeyUp(sender As Object, e As KeyEventArgs)
    If m_ControlKeyPressed Then
        If e.KeyValue = 162 OrElse e.KeyValue = 163 Then
            m_ControlKeyPressed = False
        End If
    End If
End Sub

Vb.net捕获Ctrl + C.

2 个答案: