[原]C#重绘标题栏

using System.Runtime.InteropServices;
 
    public partial class frmMain : Form
    {
        [DllImport("User32.dll")]
        private static extern IntPtr GetWindowDC(IntPtr hwnd);
        [DllImport("User32.dll")]
        private static extern int ReleaseDC(IntPtr hwnd, IntPtr hdc);
 
        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);
            switch (m.Msg)
            {
                case 0x84:
                    //这里是鼠标的移动事件
                    break;
                case 0x86: //WM_NCACTIVATE
                    goto case 0x85;
                case 0x85: //WM_NCPAINT
                    //CaptionButtonSize获取窗口标题栏中的按钮的标准大小（以像素为单位）。
                    Size si = new Size(SystemInformation.CaptionButtonSize.Width, SystemInformation.CaptionButtonSize.Height);
                    IntPtr hDC = GetWindowDC(m.HWnd);
                    //把DC转换为.NET的Graphics就可以很方便地使用Framework提供的绘图功能了
                    Graphics gs = Graphics.FromHdc(hDC);
                    Image img = Image.FromFile(Application.ExecutablePath.Replace(".EXE", ".png"));
                    //显示背景图片
                    gs.DrawImage(img, 0, 0);
                    gs.Dispose();
                    //释放GDI资源
                    ReleaseDC(m.HWnd, hDC);
                    break;
                case 0xA1://WM_NCLBUTTONDOWN
                    break;
            }
        }
  }

作者：qq283868910 发表于2012-1-9 14:01:29 原文链接

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