unit IAXCall; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, Buttons, IAX; type TfrmCall = class(TForm) GB: TGroupBox; lblhelp: TLabel; edcalladdr: TEdit; bCall: TBitBtn; bCancel: TBitBtn; procedure bCallClick(Sender: TObject); procedure FormDestroy(Sender: TObject); private { Private-Deklarationen } public { Public-Deklarationen } IAX: TIAX; end; var frmCall: TfrmCall; implementation {$R *.DFM} procedure TfrmCall.bCallClick(Sender: TObject); begin IAX.DoCall(edcalladdr.Text); end; procedure TfrmCall.FormDestroy(Sender: TObject); begin frmCall:=nil; end; end.