Below is actual code from a short demo I created when discussing a tooltip bug with the development team.  Try creating a form with a button btToolTip whose Click event would trigger this method:

        private void btToolTip_Click(object sender, EventArgs e)
        {
            Infragistics.Win.ToolTip tt = new Infragistics.Win.ToolTip(this);
            tt.ToolTipTitle = "Tooltip Title";
            tt.ToolTipText = "Tooltip text";
            tt.Show(this.RectangleToScreen(new Rectangle(50, 120, 100, 100)));
        }

I have been trying to use the .show method as described above, but my tooltip balloon always locates at x-position "0".

That is, it always locates at the left edge of my screen. Can you tell me why this is happening?

Thanks,

Dan

A quick update for those who might be interested:

 The best solution is not to use UltraToolTipManager, but manually instantiate ToolTip class and call one of its Show() overloads as shown in the code snippet:

Infragistics.Win.ToolTip tt = new Infragistics.Win.ToolTip(this.ultraGrid1);

tt.ToolTipImage = ToolTipImage.Warning;

tt.ToolTipTitle = "Tool Tip Title";

tt.ToolTipText = "This is a very long tool tip text This is a very long tool tip text This is a very long tool tip text This is a very long tool tip text ";

tt.Show(new Rectangle(Control.MousePosition.X, Control.MousePosition.Y, 100, 100));

Remember to use ToolTip class, not UltraToolTip which does not exist...

Big thanks to Jason from Infragistics Team for his support.

Ralph 

 Unfortunately none of ShowToolTip overrides takes Size or Rect, I had checked it before.

It seems the only thing I can do now is to cut the string manually and submit a feature request.