如何在PowerPoint2013插件(在C#中开发)中获取"ctrl c“或鼠标复制事件？

using System;
using System.Windows.Forms;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;

namespace PowerPointPlugin
{
    public partial class MyPlugin
    {
        private PowerPoint.Application pptApplication;
        private PowerPoint.Presentation pptPresentation;
        private PowerPoint.SlideRange selectedSlides;

        public void Initialize()
        {
            // 初始化PowerPoint应用程序
            pptApplication = new PowerPoint.Application();
            pptPresentation = pptApplication.ActivePresentation;

            // 监听复制事件
            pptApplication.WindowSelectionChange += PptApplication_WindowSelectionChange;
        }

        private void PptApplication_WindowSelectionChange(PowerPoint.Selection sel)
        {
            // 检查是否按下了Ctrl键
            if (Control.ModifierKeys == Keys.Control)
            {
                // 检查是否按下了C键
                if (sel.Type == PowerPoint.PpSelectionType.ppSelectionSlides && Clipboard.ContainsText())
                {
                    // 获取复制的文本内容
                    string copiedText = Clipboard.GetText();

                    // 在控制台输出复制的文本内容
                    Console.WriteLine("Copied Text: " + copiedText);
                }
            }
        }
    }
}