C# .Net Winform窗口特效处理

本文基于.Net开发，使用C#作为开发语言，分别包含以下效果：
移动无边框窗口、窗口移动限制（限制在屏幕内）、桌面贴边自动隐藏（仿QQ隐藏窗口）

1、移动无边框窗口
采用了消息的方式，可以实现通过窗口内的任何控件来移动窗口

1. private const int WM_NCLBUTTONDOWN = 0x00A1;
2. private const int HT_CAPTION = 0x002;
3.  
4. private void Form_MouseDown(object sender, MouseEventArgs e)
5. {
6.    if (e.Button == MouseButtons.Left)
7.    {
8.        ((Control)sender).Capture = false;
9.        Message msg = Message.Create(Handle, WM_NCLBUTTONDOWN, (IntPtr)HT_CAPTION, IntPtr.Zero);
10.        base.WndProc(ref   msg);
11.    }
12. }

使用方法：
将以上代码复制到Form的class内，将Form或Form中需要控制Form移动的控件的MouseDown事件关联到这个方法上，如：
对于Form：this.MouseDown+=new System.Windows.Forms.MouseEventHandler(Form_MouseDown);
对于其它控件：Control.MouseDown+=new System.Windows.Forms.MouseEventHandler(Form_MouseDown);

2、窗口移动限制

1. private const int WM_MOVING = 0x0216;
2. protected override void WndProc(ref Message m)
3. {
4.    switch (m.Msg)
5.    {
6.        case WM_MOVING: // 窗体移动的消息，控制窗体不会移出屏幕外
7.            int left = Marshal.ReadInt32(m.LParam, 0);
8.            int top = Marshal.ReadInt32(m.LParam, 4);
9.            int right = Marshal.ReadInt32(m.LParam, 8);
10.            int bottom = Marshal.ReadInt32(m.LParam, 12);
11.            left = Math.Min(Math.Max(0, left), Screen.PrimaryScreen.Bounds.Width - Width);
12.            top = Math.Min(Math.Max(0, top), Screen.PrimaryScreen.Bounds.Height - Height);
13.            right = Math.Min(Math.Max(Width, right), Screen.PrimaryScreen.Bounds.Width);
14.            bottom = Math.Min(Math.Max(Height, bottom), Screen.PrimaryScreen.Bounds.Height);
15.            Marshal.WriteInt32(m.LParam, 0, left);
16.            Marshal.WriteInt32(m.LParam, 4, top);
17.            Marshal.WriteInt32(m.LParam, 8, right);
18.            Marshal.WriteInt32(m.LParam, 12, bottom);
19.            break;
20.    }
21.    base.WndProc(ref m);
22. }

使用方法：
添加using System.Runtime.InteropServices;
在Form类定义中加入以上代码即可
3、桌面贴边自动隐藏

下载: FormAutoDock.cs

1. public class FormAutoDock
2. {
3. public static void SideHideOrShow(Form DockableForm, ref int DockFormHeight, Timer _dockTimer)
4. {
5. if (DockableForm.WindowState != FormWindowState.Minimized)
6. {
7. _dockTimer.Interval = 1500;
8. if (Cursor.Position.X > DockableForm.Left - 1 && Cursor.Position.X < DockableForm.Right && Cursor.Position.Y > DockableForm.Top - 1 && Cursor.Position.Y < DockableForm.Bottom)
9. {
10. if (DockableForm.Top <= 0 && DockableForm.Left > 5 && DockableForm.Left < Screen.PrimaryScreen.WorkingArea.Width - DockableForm.Width)
11. {
12. DockableForm.Top = 0;
13. }
14. else if (DockableForm.Left <= 0)
15. {
16. DockableForm.Left = 0;
17. }
18. else if (DockableForm.Left + DockableForm.Width >= Screen.PrimaryScreen.WorkingArea.Width)
19. {
20. DockableForm.Left = Screen.PrimaryScreen.WorkingArea.Width - DockableForm.Width;
21. }
22. else
23. {
24. if (DockFormHeight > 0)
25. {
26. DockableForm.Height = DockFormHeight;
27. DockFormHeight = 0;
28. }
29. }
30. }
31. else
32. {
33. if (DockFormHeight < 1)
34. {
35. DockFormHeight = DockableForm.Height;
36. }
37. if (DockableForm.Top <= 4 && DockableForm.Left > 5 && DockableForm.Left < Screen.PrimaryScreen.WorkingArea.Width - DockableForm.Width)
38. {
39. DockableForm.Top = 3 - DockableForm.Height;
40. if (DockableForm.Left <= 4)
41. {
42. DockableForm.Left = -5;
43. }
44. else if (DockableForm.Left + DockableForm.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
45. {
46. DockableForm.Left = Screen.PrimaryScreen.WorkingArea.Width - DockableForm.Width + 5;
47. }
48. }
49. else if (DockableForm.Left <= 4)
50. {
51. DockableForm.Left = 3 - DockableForm.Width;
52. }
53. else if (DockableForm.Left + DockableForm.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
54. {
55. DockableForm.Left = Screen.PrimaryScreen.WorkingArea.Width - 3;
56. }
57. _dockTimer.Interval = 200;
58. }
59. }
60. }
61. }

使用方法：
将FormAutoDock.cs文件复制到与需要处理的Form相同目录下，并添加到项目中
在Form的类中增加以下内容：
private Timer _dockTimer = null;
private int DockFormHeight = 0;
private void DockTimerAutoHide_Tick(object sender, EventArgs e)
{
FormAutoDock.SideHideOrShow(this, ref DockFormHeight, _dockTimer);
Application.DoEvents();
}

在Form类构造方法中添加以下内容：
_dockTimer = new Timer();
_dockTimer.Enabled = false;
_dockTimer.Interval = 200;
_dockTimer.Tick += new EventHandler(DockTimerAutoHide_Tick);
_dockTimer.Start();