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procedure SendKeyString(KStr: String);
var
  Scan: SHORT;
  key: Byte;
  i: Integer;
begin
  for i := 0 to length(KStr) do begin
    key := Byte(Kstr[i]);
    Scan := MapVirtualKey(key, 0);
    keybd_event(key, Scan, 0, 0);
    keybd_event(key, Scan, KEYEVENTF_KEYUP, 0);
  end;
end;                    

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}


procedure SendKeyString(KStr: String);
var
  Scan: SHORT;
  key: Byte;
  i: Integer;
begin
  for i := 0 to length(KStr) do begin
    key := Byte(Kstr[i]);
    Scan := MapVirtualKey(key, 0);
    keybd_event(key, Scan, 0, 0);
    keybd_event(key, Scan, KEYEVENTF_KEYUP, 0);
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin

  SendKeyString('test');

end;

end.                    

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time:=GetTickCount;
while (GetTickCount-time < 5000 ) do
application.ProcessMessages; //sonst friert das Programm ein