winform 移動表單，和表單陰影(引用)

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無邊框表單移動:
//表單移動API[DllImport("user32.dll")]public static extern bool ReleaseCapture();[DllImport("user32.dll")]public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int IParam);public const int WM_SYSCOMMAND = 0x0112;public const int SC_MOVE = 0xF010;public const int HTCAPTION = 0x0002;[DllImport("user32")]private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, IntPtr lParam);private const int WM_SETREDRAW = 0xB;private void Form1_MouseDown(object sender, MouseEventArgs e){    if (this.WindowState == FormWindowState.Normal)    {        ReleaseCapture();        SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);    }}
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表單陰影：

 //表單陰影API        const int CS_DropSHADOW = 0x20000;        const int GCL_STYLE = (-26);        [DllImport("user32.dll", CharSet = CharSet.Auto)]        public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);        [DllImport("user32.dll", CharSet = CharSet.Auto)]        public static extern int GetClassLong(IntPtr hwnd, int nIndex);        public Form1()        {            InitializeComponent();            SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW);        }

winform 移動表單，和表單陰影(引用)