不用多說，貼出代碼就能看懂！
1 //類名:EcanQQ
2 //作用:QQ吸附表單
3 //作者：劉典武
4 //時間：2010-12-01
5 //用法：添加timer控制項，enable設定為true,執行個體化類EcanQQ qqfrm = new EcanQQ();timer1_Tick時間調用qqfrm.hide_show(this, ref height, timer1);
6
7 using System;
8 using System.Collections.Generic;
9 using System.Text;
10 using System.Windows.Forms;
11
12 namespace Ecan
13 {
14 public class EcanQQ
15 {
16 /// <summary>
17 /// QQ吸附表單
18 /// </summary>
19 /// <param name="frm">要吸附邊緣的表單</param>
20 /// <param name="frmHeight">表單的高度</param>
21 /// <param name="timer">定時器控制項</param>
22 //用法：在對應表單timer控制項的Tick事件中寫代碼 int height = this.Height; EcanQQ.hide_show(this, ref height, timer1);
23
24 public void hide_show(Form frm, ref int frmHeight, Timer timer)
25 {
26 if (frm.WindowState != FormWindowState.Minimized)
27 {
28 timer.Interval = 100;
29 if (Cursor.Position.X > frm.Left - 1 && Cursor.Position.X < frm.Right && Cursor.Position.Y > frm.Top - 1 && Cursor.Position.Y < frm.Bottom)
30 {
31 if (frm.Top <= 0 && frm.Left > 5 && frm.Left < Screen.PrimaryScreen.WorkingArea.Width - frm.Width)
32 {
33 frm.Top = 0;
34 }
35 else if (frm.Left <= 0)
36 {
37 frm.Left = 0;
38 }
39 else if (frm.Left + frm.Width > Screen.PrimaryScreen.WorkingArea.Width)
40 {
41 frm.Left = Screen.PrimaryScreen.WorkingArea.Width - frm.Width;
42 }
43 else
44 {
45 if (frmHeight > 0)
46 {
47 frm.Height = frmHeight;
48 frmHeight = 0;
49 }
50 }
51 }
52 else
53 {
54 if (frmHeight < 1)
55 {
56 frmHeight = frm.Height;
57 }
58 if (frm.Top <= 4 && frm.Left > 5 && frm.Left < Screen.PrimaryScreen.WorkingArea.Width - frm.Width)
59 {
60 frm.Top = 3 - frm.Height;
61 if (frm.Left <= 4)
62 {
63 frm.Left = -5;
64 }
65 else if (frm.Left + frm.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
66 {
67 frm.Left = Screen.PrimaryScreen.WorkingArea.Width - frm.Width + 5;
68 }
69 }
70 else if (frm.Left <= 4)
71 {
72 frm.Left = 3 - frm.Width;
73 }
74 else if (frm.Left + frm.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
75 {
76 frm.Left = Screen.PrimaryScreen.WorkingArea.Width - 3;
77 }
78 }
79 }
80 }
81 }
82 }
83
效果：表單移動到螢幕邊緣會自動調整，滑鼠移上去的話就顯示出來！
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