自定义窗体标题栏

在没有标题栏的form里，用panel做透明标题栏，实现和form标题栏一样的可移动窗体的效果。

1.新建form窗体

2.蒋一个panel控件放到窗体最上端，将panel控件的BackColor属性设置为Transparent透明。

3.加如以下代码

private Point mouseOffset; //记录鼠标指针的坐标
 2 privatebool isMouseDown =false; //记录鼠标按键是否按下
 3 privatevoid panel2_MouseEnter(object sender, EventArgs e)
 4         {
 5 this.panel2.BackColor = Color.FromArgb(65, 204, 212, 230);//鼠标移动到控件上时显示为半透明效果。
 6         }
 7 
 8 privatevoid panel2_MouseLeave(object sender, EventArgs e)
 9         {
10 this.panel2.BackColor = Color.Transparent;//鼠标离开控件时控件变透明。
11 
12         }
13 
14 privatevoid panel2_MouseDown(object sender, MouseEventArgs e)
15         {
16 int xOffset;
17 int yOffset;
18 if (e.Button == MouseButtons.Left)
19             {
20                 xOffset =-e.X;
21                 yOffset =-e.Y;
22                 mouseOffset =new Point(xOffset, yOffset);
23                 isMouseDown =true;
24             }
25 
26         }
27 
28 privatevoid panel2_MouseUp(object sender, MouseEventArgs e)
29         {
30 // 修改鼠标状态isMouseDown的值
31 // 确保只有鼠标左键按下并移动时，才移动窗体
32 if (e.Button == MouseButtons.Left)
33             {
34                 isMouseDown =false;
35             }
36 
37         }
38 
39 privatevoid panel2_MouseMove(object sender, MouseEventArgs e)
40         {
41 if (isMouseDown)
42             {
43                 Point mousePos = Control.MousePosition;
44                 mousePos.Offset(mouseOffset.X, mouseOffset.Y);
45                 Location = mousePos;
46             }
47 
48         }
49