Add files via upload

Author: Nahvine

App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+</configuration>

ElipseControl.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace ElipseToolDemo
+{
+    class ElipseControl : Component
+    {
+        [DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
+        private static extern IntPtr CreateRoundRectRgn
+            (
+               int nLeftRect,
+               int nTopRect,
+               int nRightRect,
+               int nBottomRect,
+               int nWidthEllipse,
+               int nHeightEllipse
+            );
+        private Control? _cntrl;
+        private int _CornerRadius = 30;
+
+        public Control TargetControl
+        {
+            get { return _cntrl; }
+            set
+            {
+                _cntrl = value;
+                _cntrl.SizeChanged += (sender, eventArgs) => _cntrl.Region = Region.FromHrgn(CreateRoundRectRgn(0, 0, _cntrl.Width, _cntrl.Height, _CornerRadius, _CornerRadius));
+            }
+        }
+
+        public int CornerRadius
+        {
+            get { return _CornerRadius; }
+            set
+            {
+                _CornerRadius = value;
+                if (_cntrl != null)
+                    _cntrl.Region = Region.FromHrgn(CreateRoundRectRgn(0, 0, _cntrl.Width, _cntrl.Height, _CornerRadius, _CornerRadius));
+            }
+        }
+    }
+}