Thank you, uncommenting resolve my problem. On 20-11-2014 16:02, Juha Manninen wrote: > // if FCurrentEdit is TComboBox then > // TComboBox(FCurrentEdit).ItemHeight:=EditCompRect.Bottom-EditCompRect.Top-6; > > You can try if uncommenting them helps. > If not then you can do other experiments with the same code block. It > has only few lines.