用C# Builder制作不规则窗体

作不规则窗体涉及到API的调用和大量的编程，是件很复杂的事情。下面我们可以使用Borland C# Builder轻松的实现一个不规则窗体，以下面用一个示例来讲述其制作过程。
　　一.准备不规则窗体位图
　　二.窗体的设置
　　三.代码的完成
　　一.准备不规则窗体位图
　　为了方便起见，我们随便找几个别的软件用的Skin。
这里使用金山影霸 2003的安装目录下的skins\ocean\KingDVD_Disable.BMP
当然完全可以使用画图工具，制作一个有形状的位图，背景使用一种特别的颜色，如白色。这个颜色会在后面用得上。
　　二.窗体的设置
　　1.新建C# Application
　　2.选中新建的窗体，设置其相应属性：
　　　(1).将 FormBorderStyle 属性设置为 None。
　　　(2).将窗体的 BackgroundImage 属性设置为先前面的位图文件。
　　　(3).将 TransparencyKey 属性设置为位图文件的背景色，本例中为白色。（此属性告诉应用程序窗体中的哪些部分需要设置为透明。 ）
　　　(4).加一个picturebox1，就是一关闭位图，点击时关闭应用程序。
　　　(5).加一个contextMenu1，添加一菜单项“退出”，将winform的contextMenu设为contextMenu1。
　　按F9运行你的程序，就可以看到你的不规则窗体了。
　　三.实现代码
　　前面做的窗口还不能移动。加入下面的代码使其能移动起来，帖出完整的示例代码：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace SForm
{
/// <summary>
/// Summary description for WinForm.
/// </summary>
public class WinForm : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.ContextMenu contextMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private Point mouseOffset; //记录鼠标指针的坐标
private bool isMouseDown = false;
private System.Windows.Forms.PictureBox pictureBox1; //记录鼠标按键是否按下
public WinForm()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose (bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(WinForm));
this.contextMenu1 = new System.Windows.Forms.ContextMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.SuspendLayout();
//
// contextMenu1
//
this.contextMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem1});
//
// menuItem1
//
this.menuItem1.Index = 0;
this.menuItem1.Text = "退出";
this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click);
//
// pictureBox1
//
this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
this.pictureBox1.Location = new System.Drawing.Point(290, 8);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(14, 13);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
this.pictureBox1.Click += new System.EventHandler(this.pictureBox1_Click);
//
// WinForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(365, 235);
this.ContextMenu = this.contextMenu1;
this.Controls.Add(this.pictureBox1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "WinForm";
this.Text = "WinForm";
this.TransparencyKey = System.Drawing.Color.White;
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.WinForm_MouseDown);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.WinForm_MouseUp);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.WinForm_MouseMove);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new WinForm());
}
private void menuItem1_Click(object sender, System.EventArgs e)
{
this.Close();
}
private void WinForm_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (isMouseDown)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(mouseOffset.X, mouseOffset.Y);
Location = mousePos;
}
}
private void WinForm_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
int xOffset;
int yOffset;
if (e.Button == MouseButtons.Left)
{
xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
yOffset = -e.Y - SystemInformation.CaptionHeight -
SystemInformation.FrameBorderSize.Height;
mouseOffset = new Point(xOffset, yOffset);
isMouseDown = true;
}
}
private void WinForm_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
// 修改鼠标状态isMouseDown的值
// 确保只有鼠标左键按下并移动时，才移动窗体
if (e.Button == MouseButtons.Left)
{
isMouseDown = false;
}
}
private void pictureBox1_Click(object sender, System.EventArgs e)
{
this.Close();
}
}
}
　　注：如果监视器的颜色深度设置大于 24 位，TransparencyKey 设置成白色，窗体的非透明部分还是会显示出来，不知道为什么。