Sorry for the late reply.

Actually I still need help, because I can't use an UltracomboEditor instead of Ultracombo (I need multiple columns).

Still looking for a way to determine if the text is fully visible in the text area or not

Hi,

As I said, there's no simple way to do this. I took another look and I checked to see if the control itself is keeping track of this information, but it is not. So the only thing you can do here is measure the text yourself using DrawUtility.MeasureString and the compare that the RectInsideBorder of the EditorWithTextUIElement.

Try something like this:

        private bool IsTextFullyVisible(UltraCombo combo)
        {
            Graphics gr = DrawUtility.GetCachedGraphics(this.ultraCombo1);
            Font fontToDispose = null;

            try
            {
                AppearanceData appData = new AppearanceData();
                AppearancePropFlags requestedProps = AppearancePropFlags.FontData;
                this.ultraCombo1.ResolveAppearance(ref appData, requestedProps);
                fontToDispose = appData.CreateFont(this.ultraCombo1.Font);
                Font font = fontToDispose != null ? fontToDispose : this.ultraCombo1.Font;

                EmbeddableUIElementBase editorElement = this.ultraCombo1.UIElement.GetDescendant(typeof(EmbeddableUIElementBase)) as EmbeddableUIElementBase;
                Size size = Size.Ceiling(DrawUtility.MeasureString(gr, this.ultraCombo1.Text, font, editorElement.Owner, editorElement.OwnerContext));

                return editorElement.RectInsideBorders.Width > size.Width;
            }
            finally
            {
                if (fontToDispose != null)
                    fontToDispose.Dispose();

                DrawUtility.ReleaseCachedGraphics(gr);
            }
        }

I think this will only work when the combo does not have focus (is not in edit mode). Also, you might have to play around with the return statement here - there is probably a little bit of padding inside the element, so you might need to add a couple of pixels to the width here to make it accurate all the time.