c# - Displaying tooltip on mouse hover of a text

Question

I want to display a tooltip when the mouse hovers over a link in my custom rich edit control. Consider the following text:

We all sleep at night .

In my case the word sleep is a link.

When the user moves the mouse under the link, in this case "sleep", I want to display a tooltip for the link.

The following came to my mind, but they are not working

1) Trapping OnMouseHover

if(this.Cursor == Cursors.Hand)
   tooltip.Show(textbox,"My tooltip");
else
   tooltip.Hide(textbox);

But this does not work out.

UPDATE

The links mentioned are not URLs, i.e these are custom links, so Regex won't be of much help here, it can be any text. The user can choose to create it a a link.

Though I have not tried GetPosition method, I dont think it would be that elegant in terms of design and maintenance.

Let me say I have the following line, in my richedit box

We sleep at night. But the bats stay awake. Cockroaches become active at night.

In the above sentence, I want three different tooltips, when the mouse hovers over them.

sleep -> Human beings
awake -> Nightwatchman here
active -> My day begins

I trapped OnMouseMove as follows:

Working- with Messagebox

OnMouseMove( )
{

   // check to see if the cursor is over a link
   // though this is not the correct approach, I am worried why does not a tooltip show up
   if(this.Cursor.current == Cursors.hand )
   {
     Messagebox.show("you are under a link");
   }
}

Not Working - with Tooltip - Tooltip does not show up

OnMouseMove( MouseventArgs e )
{

   if(cursor.current == cursors.hand )
   {
     tooltip.show(richeditbox,e.x,e.y,1000);
   }
}

Answer 1

Just add ToolTip tool from toolbox to the form and add this code in a mousemove event of any control you want to make the tooltip start on its mousemove

private void textBox3_MouseMove(object sender, MouseEventArgs e)
    {
      toolTip1.SetToolTip(textBox3,"Tooltip text"); // you can change the first parameter (textbox3) on any control you wanna focus
    }

hope it helps

peace