Form.OnMouseEnter : Form « System.Windows.Forms « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Windows.Forms
3. Form

Form.OnMouseEnter

  




using System;
using System.Drawing;
using System.Windows.Forms;
   
class EnterLeave: Form
{
     bool bInside = false;
   
     public static void Main()
     {
          Application.Run(new EnterLeave());
     }
     public EnterLeave()
     {
     }
     protected override void OnMouseEnter(EventArgs ea)
     {
          bInside = true;
          Invalidate();
     }
     protected override void OnMouseLeave(EventArgs ea)
     {
          bInside = false;
          Invalidate();
     }
     protected override void OnMouseHover(EventArgs ea)
     {
          Graphics grfx = CreateGraphics();
    
          grfx.Clear(Color.Red);
          System.Threading.Thread.Sleep(500);
          grfx.Clear(Color.Green);
          grfx.Dispose();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx = pea.Graphics;
   
          grfx.Clear(bInside ? Color.Green : BackColor);
     }
}

   
    
  

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