Question

I am working on an exercise to create a custom control. The custom control is a simple label inheriting Control.

Using the tool tip code below:

m_toolTip = new ToolTip();

protected override void OnMouseMove(MouseEventArgs e) {
    m_toolTip.SetToolTip(this, Text);
    base.OnMouseMove(e);
}

protected override void OnMouseLeave(EventArgs e) {
    m_toolTip.RemoveAll();
    base.OnMouseLeave(e);
}

No configurations are used for the tool tip.

When I mouse over the label (although you can’t see the mouse):

Now, after I have left the control and moused over the second label:

When you hover the mouse over a MS Label, the tool tip will show up and then immediately disappears. How can I better duplicate the behavior that the standard MS label displays?

Answer 1

I resolved the issue with the following change:

protected override void OnMouseHover(EventArgs e) {
    var m_position = PointToClient(Control.MousePosition);
    m_toolTip.Show(Text, this, m_position.X + 10, m_position.Y, 20000);
    base.OnMouseHover(e);
}

I removed the previous OnMouseMove override.

Additionally, I also tweaked some settings that seem to work for me.