How to use ToolTip Control

Drag and drop a Tooltip control and control on which you want to use tooltip control.

Code:

private void frmToolTip_Load(object sender, EventArgs e)
{
            //tooltip is set to Button
            toolTip1.SetToolTip(button1, "Click to next Image");
}

Run the project

When the mouse will move over the Next button then tooltip will show. 

ToolTip properties

Active - set the tooltip status, by default it set to true set false to hide the tooltip.

ToolTipIcon -set the icon that will show on the tooltip.

Example:

private void frmToolTip_Load(object sender, EventArgs e)
{
            //set the tooltip icon
            toolTip1.ToolTipIcon = ToolTipIcon.Info;
}

IsBalloon:  when IsBalloon property is true then tooltip will display as a balloon.Example:

private void frmToolTip_Load(object sender, EventArgs e)
{
            //tooltip show as baloon
            toolTip1.IsBalloon = true;
}