C# 我可以将窗体的MouseDown事件传递给自定义类吗？

我有一个小方法，允许我拖动没有边框/标题栏的表单：

 public const int WM_NCLBUTTONDOWN = 0xA1;
    public const int HT_CAPTION = 0x2;
    [DllImportAttribute("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd,
                     int Msg, int wParam, int lParam);
    [DllImportAttribute("user32.dll")]
    public static extern bool ReleaseCapture();





private void Form1_MouseDown(object sender, MouseEventArgs e)
            {
                if (e.Button == MouseButtons.Left)
                {
                    ReleaseCapture();
                    SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
                }
            }

在设计师中：

    this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.RemoteControl_MouseDown);

目前，我必须将它添加到应用程序中的每个表单中，这很烦人。因此，我尝试将其添加到自定义类中，我使用该类设置表单样式：

public class ThemeManager
{

    // Required for drag / drop
    public const int WM_NCLBUTTONDOWN = 0xA1;
    public const int HT_CAPTION = 0x2;
    [DllImportAttribute("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd,
                     int Msg, int wParam, int lParam);
    [DllImportAttribute("user32.dll")]
    public static extern bool ReleaseCapture();

    public void setTheme(Form sender)
    {
       sender.MouseDown += new System.Windows.Forms.MouseEventHandler(MyForm_MouseDown);
    }

    private void MyForm_MouseDown(object sender, MouseEventArgs e)
    {
        Form f = sender as Form;
        if (e.Button == MouseButtons.Left)
        {
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
        }
    }
}

问题是，当我这样做时，会出现以下错误：

The name 'Handle' does not exist in the current context 

我怎样才能让它工作呢？

这不应该是：

SendMessage(f.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);

这不应该是：

SendMessage(f.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);

---

确实应该！发帖后立即实现。干杯，伙计，真的应该！发帖后立即实现。干杯，伙计。