我可以將表單的MouseDown事件傳遞給自定義類嗎？

Question

我有一個小方法，讓我拖動沒有邊框/標題欄的一種形式：

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); 
       } 
      } 

，並在設計師

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

目前，我必須將它添加到在應用程序中的每個表單，這是煩人的。因此我試圖將它添加到自定義類，這是我使用的樣式的形式：

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); 
     } 
    } 
} 

麻煩的是，當我這樣說，我得到以下錯誤：

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

我怎樣才能使它工作？

Answer 1

難道不應該是：

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