C#无边框窗体移动的三种方法

肥龍

1.重写wndProc代码：

1. 
   
2. protected override void WndProc(ref Message m)
   
3. {        
   
4.         const int WM_NCHITTEST = 0x84;
   
5.         const int HTCLIENT = 0x01;
   
6.         const int HTCAPTION = 0x02;
   
7.          if (m.Msg == WM_NCHITTEST)
   
8.         {
   
9.                 this.DefWndProc(ref m);
   
10.                 if (m.Result.ToInt32() == HTCLIENT)
    
11.                     m.Result = new IntPtr(HTCAPTION);
    
12.                 else
    
13.                     base.WndProc(ref m);
    
14.         }
    
15.         else
    
16.         {
    
17.                 base.WndProc(ref m);
    
18.         }
    
19. }
    
20. 2.创建消息
    
21. 代码：
    
22. private const int WM_NCLBUTTONDOWN = 0x00A1;
    
23. private const int WM_NCHITTEST = 0x84;
    
24. private const int HT_CAPTION = 0x2;
    
25. private const int HT_CLIENT = 0x1;
    
26. private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    
27. {
    
28.     //this.Capture = false;
    
29.     pictureBox1.Capture = false;
    
30.     Message msg = Message.Create(Handle, WM_NCLBUTTONDOWN, (IntPtr)HT_CAPTION, IntPtr.Zero);
    
31.     WndProc(ref   msg);   
    
32. }
    
33. 3.调用API代码：
    
34. using System.Runtime.InteropServices;
    
35. [DllImport("user32.dll")]
    
36. public static extern bool ReleaseCapture();
    
37. [DllImport("user32.dll")]
    
38. public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
    
39.    public const int WM_SYSCOMMAND = 0x0112;
    
40.    public const int SC_MOVE = 0xF010;
    
41. public const int HTCAPTION = 0x0002;
    
42. 
    
43.    //在窗体的_MouseDown中加入如下代码:
    
44. 如:
    
45. private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
    
46. {
    
47. ReleaseCapture();
    
48. SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
    
49. }

複製代碼