vb.net - VB.net 捕获 Ctrl+C

Question

我想在有人使用时捕捉，CtrlC即使是在失焦的情况下。我正在使用 Visual Basic 2010。

Answer 1

好的，所以我为您提供了一个我验证有效的解决方案。不过，您将需要一个 C# 库，并且需要做一些额外的工作，但并不多。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。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;
    }

}
}

现在在您的程序中可以执行以下操作：

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挂钩。这个 CodeProject 示例完美运行，我自己将其用于学习目的。我稍微修改了代码，但这里有一个简单的例子，说明你可以用那个库做些什么。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，并且该库有据可查。

   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