OnMouseEnter, OnMouseHover, OnMouseLeave event

 

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);
     }
}

1.	Form Window event: closing, closed, load, activated, deactivated
2.	Scrolling (AutoScrollMinSize)
3.	OnInputLanguageChanged
4.	Form Focus event
5.	On Mouse Wheel
6.	OnKeyDown event
7.	OnClick event
8.	Form OnResize
9.	Form OnMove event
10.	Cancel Event
11.	Uncloseable event
12.	Bind key action to a form window
13.	Form window closing event
14.	Form window load event
15.	Form resize and redraw
16.	Form Mouse down action
17.	Form Key Press action
18.	Form Paint event
19.	Scroll Shapes

OnMouseEnter, OnMouseHover, OnMouseLeave event : Form Event « GUI Windows Form « C# / C Sharp

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