Mega Code Archive
ComboBox drop down OnEnter
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Title: ComboBox drop down OnEnter.
Question: How to make the combobox drop down when you enter it with the tab key.
Answer:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton; //This is just a component to tab from !!
ComboBox1: TComboBox;
procedure ComboBox1Enter(Sender: TObject);
procedure ComboBox1Exit(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.ComboBox1Enter(Sender: TObject);
begin
SendMessage(ComboBox1.handle, CB_SHOWDROPDOWN, Integer(True), 0);
end;
procedure TForm1.ComboBox1Exit(Sender: TObject); //Drop-down close.
begin
SendMessage(ComboBox1.handle, CB_SHOWDROPDOWN, Integer(False), 0);
end;
end.
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