public static void DrawRectangle(int x, int y, int width, int height, int lineWidth, Color color)
{
IntPtr desk = BaseWin32Api.GetDesktopWindow();
IntPtr deskDC = BaseWin32Api.GetDCEx(desk, IntPtr.Zero, 0x403);
BaseWin32Api.RedrawWindow(IntPtr.Zero, null, IntPtr.Zero, 0x85);
using (Graphics g = Graphics.FromHdc(deskDC))
{
//实例化Pen类
System.Drawing.Pen myPen = new System.Drawing.Pen(color, lineWidth);
g.DrawRectangle(myPen, 0, 0, width - lineWidth, height - lineWidth);
}
//g.DrawString("Lightning", new Font("宋体", 50, FontStyle.Bold), Brushes.Red, new PointF(100, 100));
}
/// <summary>
/// 根据窗口句柄矩形
/// </summary>
/// <param name="tarent">目标窗口句柄</param>
/// <param name="width">矩形宽度</param>
/// <param name="height">矩形高度</param>
/// <param name="lineWidth">矩形线条宽度(粗细度)</param>
/// <param name="color">颜色</param>
public static void DrawRectangle(IntPtr tarent, int width, int height, int lineWidth, Color color)
{
if (tarent == null || width <= 0 || height <= 0 || lineWidth <= 0)
{
return;
}
Task.Factory.StartNew(() =>
{
//获得句柄的DC
var hdc = BaseWin32Api.GetWindowDC(tarent);
//if (LastPtr != null)
// BaseWin32Api.RedrawWindow(hdc, null, IntPtr.Zero, 0x85);
//TODO 重新绘图会导致卡顿问题[性能受到很大的影响]
BaseWin32Api.RedrawWindow(IntPtr.Zero, null, IntPtr.Zero, 0x85);
Thread.Sleep(400);
//if (graphics == null)
// graphics = Graphics.FromHdc(hdc);
//else
// graphics = Graphics.FromHdc(hdc);
////实例化Pen类
//if (_pen == null)
// _pen = new System.Drawing.Pen(color, lineWidth);
////调用Graphics对象的DrawRectangle方法
//graphics.DrawRectangle(_pen, 0, 0, width - lineWidth, height - lineWidth);
using (Graphics gr = Graphics.FromHdc(hdc))
{
//实例化Pen类
var pen = new System.Drawing.Pen(color, lineWidth);
//调用Graphics对象的DrawRectangle方法
gr.DrawRectangle(pen, 0, 0, width - lineWidth, height - lineWidth);
}
LastPtr = tarent;
});
}