怎么用C#创建一个中空的窗体
有没有人知道，用c# 创建自定窗体，需要客户区是一个相框形状的，就是中间是空的
c#
自定义窗体
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http://www.cnblogs.com/jxsoft/archive/2011/03/09/1978153.html
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给窗体设置一个背景色，然后设置窗体TransparencyKey属性和背景色一个颜色，然后窗体就是透明的了
--------------------编程问答--------------------
http://www.cnblogs.com/alexis/archive/2010/08/29/1811826.html
--------------------编程问答--------------------
http://www.cnblogs.com/alexis/archive/2010/08/29/1811826.html
--------------------编程问答--------------------
public partial class Form1 : Form
{
const int SC_MOVE = 0xF010;
const int HTCAPTION = 0x0002;
const int WM_SYSCOMMAND = 0x0112;
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
Bitmap bgImage;
public Form1()
{
InitializeComponent();
bgImage = Properties.Resources.pic;
FormBorderStyle = FormBorderStyle.None;
BackColor = Color.White;
TransparencyKey = Color.White;
Paint += new PaintEventHandler(Form1_Paint);
MouseDown += new MouseEventHandler(Form1_MouseDown);
}
void Form1_MouseDown(object sender, MouseEventArgs e)
{
ReleaseCapture();
SendMessage(Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}
void Form1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImage(bgImage, 0, 0, bgImage.Width, bgImage.Height);
}
}
补充：.NET技术 , C#
