窗体移动和窗体阴影代码

 1 public partial class Form2 : Form
 2     {
 3         //窗体阴影
 4         private const int CS_DropSHADOW = 0x20000;
 5         private const int GCL_STYLE = (-26);
 6         [DllImport("user32.dll", CharSet = CharSet.Auto)]
 7         public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);
 8         [DllImport("user32.dll", CharSet = CharSet.Auto)]
 9         public static extern int GetClassLong(IntPtr hwnd, int nIndex);
10 
11         public Form2()
12         {            
13             InitializeComponent();
14             SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW);//调用窗体阴影函数
15         }
16 
17         #region//窗体移动API
18         [DllImport("user32.dll")]
19         public static extern bool ReleaseCapture();
20         [DllImport("user32.dll")]
21         public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int IParam);
22         public const int WM_SYSCOMMAND = 0x0112;
23         public const int SC_MOVE = 0xF010;
24         public const int HTCAPTION = 0x0002;
25         [DllImport("user32")]
26         private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, IntPtr lParam);
27         private const int WM_SETREDRAW = 0xB;
28 
29         private void Form2_MouseDown(object sender, MouseEventArgs e)//一个鼠标按下事件
30         {
31             if (this.WindowState == FormWindowState.Normal)
32             {
33                 ReleaseCapture();
34                 SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
35             }
36         }
37         #endregion