C#鼠标拖动任意控件(winform)

using System.Runtime.InteropServices;  

//并为控件 添加 MouseDown 事件

// C#鼠标拖动任意控件

// 利用Windows的API函数：SendMessage 和 ReleaseCapture

const uint WM_SYSCOMMAND = 0x0112;

const uint SC_MOVE = 0xF010;

const uint HTCAPTION = 0x0002;

[DllImport("user32.dll", EntryPoint = "SendMessageA")]

private static extern int SendMessage(IntPtr hwnd, uint wMsg, uint wParam, uint lParam);

[DllImport("user32.dll")]

private static extern int ReleaseCapture();

void ControlMouseDown(object sender, MouseEventArgs e)

{

ReleaseCapture();

SendMessage((sender as Control).Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);

}