我如何产生一个消息关闭form

[icwin]

谢谢

[brallow]

public const int WM_CLOSE = 0x0010;

[DllImport("User32.dll")]
public static extern Int32 SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);


//调用此代码即发送关闭消息到指定的窗口
public void SendCloseWindow(Form f)
{
SendMessage(f.Handle,WM_CLOSE,0,0);
}

[brallow]

public const int WM_CLOSE = 0x0010; 

[DllImport("User32.dll")] 
public static extern Int32 SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); 


//调用此代码即发送关闭消息到指定的窗口 
public void SendCloseWindow(Form f) 
{ 
  SendMessage(f.Handle,WM_CLOSE,0,0); 
}

[brallow]

需要引用空间：
using System.Runtime.InteropServices;

[ZengHD]

        using System.Runtime.InteropServices;
        [DllImport("User32.dll")]
        private static extern IntPtr SendMessage(IntPtr hwnd, int msg, int wParam, int lParam);

        private const int WM_CLOSE = 0x0010;
        private void button1_Click(object sender, EventArgs e)
        {
            SendMessage(this.Handle, WM_CLOSE, 0, 0);          
        }

[walkingmu]

this.Close();