C# 关键词'；这'；在静态属性、静态方法或静态字段初始值设定项中无效

我正在使用以下代码：

 public partial class ThisAddIn
{
    private const int WH_KEYBOARD_LL = 13;
    private const int WM_KEYDOWN = 0x0100;

    private static IntPtr hookId = IntPtr.Zero;
    private delegate IntPtr HookProcedure(int nCode, IntPtr wParam, IntPtr lParam);
    private static HookProcedure procedure = HookCallback;

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport("user32.dll", SetLastError = true)]
    private static extern bool UnhookWindowsHookEx(IntPtr hhk);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr SetWindowsHookEx(int idHook, HookProcedure lpfn, IntPtr hMod, uint dwThreadId);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        hookId = SetHook(procedure);

    }

    private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
    {
        UnhookWindowsHookEx(hookId); 
    }

    private static IntPtr SetHook(HookProcedure procedure)
    {
        using (Process process = Process.GetCurrentProcess())
        using (ProcessModule module = process.MainModule)
            return SetWindowsHookEx(WH_KEYBOARD_LL, procedure, GetModuleHandle(module.ModuleName), 0);
    }

    private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
    {
        if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
        {
            int pointerCode = Marshal.ReadInt32(lParam);
            string pressedKey = ((Keys)pointerCode).ToString();

            //Do some sort of processing on key press
            var thread = new Thread(() => 
            {   MessageBox.Show(pressedKey);
                if (pressedKey.Equals("Space") || pressedKey.Equals("Tab"))
                    {
                        ***Word.Range rng = this.Application.ActiveDocument.Words.Last;
                        rng.Select();
                        rng.Copy();
                        String input = Clipboard.GetText(TextDataFormat.Text);
                    }               
            });
            thread.Start();

        }
        return CallNextHookEx(hookId, nCode, wParam, lParam);
    }

    private void InternalStartup()
    {
        this.Startup += new System.EventHandler(ThisAddIn_Startup);
        this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
    }
}

对于标记为***的行，我得到以下错误：

错误1关键字“this”在静态属性static中无效 方法或静态字段初始值设定项

---

请注意，

HookCallback

静态方法中的

this

关键字有问题：

private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
    if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
    {
        int pointerCode = Marshal.ReadInt32(lParam);
        string pressedKey = ((Keys)pointerCode).ToString();

        //Do some sort of processing on key press
        var thread = new Thread(() => 
        {   MessageBox.Show(pressedKey);
            if (pressedKey.Equals("Space") || pressedKey.Equals("Tab"))
                {

                    ***Word.Range rng = this.Application.ActiveDocument.Words.Last;
                    rng.Select();
                    rng.Copy();
                    String input = Clipboard.GetText(TextDataFormat.Text);
                }               
        });
        thread.Start();

    }
    return CallNextHookEx(hookId, nCode, wParam, lParam);
}

---

如果

Application.ActiveDocument

在静态上下文中不可用（即如果它前面没有

this

，它就不能工作），则需要传入所需的值。

这是一个非常糟糕的标题。这不能解释你的问题。我必须将字符串按键传递给此Addin_启动。。我该怎么做呢？现在回想起来，我看到你是如何耐心地回答一个与OOP基本概念相关的问题的。我真的很感谢你耐心地帮助新手……）即使这些天有了更多的知识，我有时还是会问一些非常基本的问题。一路上我得到了很多帮助。