u_combo.dfm

Here s a demonstration about Auto Drop Combobox

object Form1: TForm1
  Left = 193
  Top = 112
  Width = 270
  Height = 394
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object Edit1: TEdit
    Left = 88
    Top = 16
    Width = 121
    Height = 21
    TabOrder = 0
    Text = ' '
  end
  object Edit2: TEdit
    Left = 88
    Top = 56
    Width = 121
    Height = 21
    TabOrder = 1
    Text = ' '
  end
  object ComboBox1: TComboBox
    Left = 88
    Top = 96
    Width = 145
    Height = 21
    ItemHeight = 13
    TabOrder = 2
    OnEnter = ComboBox1Enter
    Items.Strings = (
      'MARIA'
      'MARTA'
      'MONICA'
      'MONIQUE'
      'MICHELE')
  end
  object Edit3: TEdit
    Left = 88
    Top = 136
    Width = 121
    Height = 21
    TabOrder = 3
    Text = ' '
  end
end