快速設置無標題欄進行拖動窗體

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1、導包：using System.Runtime.InteropServices;

2、將以下代碼放入類中：

        [DllImport("user32.dll")]

        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]

        public static extern bool SendMessage(IntPtrhwnd,int wMsg,intwParam,int lParam);

        public const intWM_SYSCOMMAND = 0x0112;

        public const int SC_MOVE =0xF010;

        public const int HTCAPTION =0x0002;

3、設置窗體鼠標按下事件，在事件方法中黏貼如下代碼：

            ReleaseCapture();

            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);