Delphi-OLE, Änderung wird nicht gespeichert

[hoika]

Hallo #,

das folgende Stück Code soll eine Excel-Datei öffnen,
was eintragen und die Datei wieder speichern.
Problem
Keine Fehlermeldung, es wird aber nix gespeichert !

Was mache ich falsch ?

Danke

Heiko

Delphi-Quellcode:

procedure TForm_SMS_Import.DoSave;
var
  iCol              : Integer;
  sFilename         : String;
  ExcelApplication0 : TExcelApplication;
  ExcelWorkbook0    : TExcelWorkbook;
  ExcelWorksheet0   : TExcelWorksheet;
  SaveChanges       : OleVariant;

begin
  Button_Save.Enabled:= False;
  try
    SaveDialog2.InitialDir:= ExtractFilePath(OpenDialog1.FileName);
    if SaveDialog2.Execute=False then Exit;

    ExcelApplication0 := TExcelApplication.Create(NIL);
    ExcelWorkbook0    := TExcelWorkbook.Create(NIL);
    ExcelWorksheet0   := TExcelWorksheet.Create(NIL);
    try
      ExcelApplication0.Connect;
      ExcelApplication0.Visible[flcid]:=False;
      ExcelApplication0.UserControl:=true;

      sFilename:= OpenDialog1.FileName;
      ExcelWorkbook0.ConnectTo(ExcelApplication0.Workbooks.Open(sFilename,
           emptyParam, emptyParam, emptyParam, emptyParam, emptyParam,
           emptyParam, emptyParam, emptyParam, emptyParam, emptyParam,
           emptyParam, emptyParam, flcid));
      ExcelWorksheet0.ConnectTo(ExcelWorkbook0.Sheets.Item[1] as ExcelWorkSheet);

      ExcelWorksheet0.Range['A5','A5'].Value:= 'Test';

      ExcelWorksheet0.Cells.Item[1,1].Value:= 'Test';

(*
      SaveChanges:= True;
      ExcelWorkbook0.Close(SaveChanges, EmptyParam, EmptyParam, flcid);
*)

//      ExcelApplication0.DisplayAlerts[flcid]:= True;
    finally
(*
      ExcelWorkbook0.Close(False);
*)
      SaveChanges:= True;
      ExcelWorkbook0.Save;

      ExcelWorksheet0.Disconnect;
      FreeAndNIL(ExcelWorksheet0);

      // Workbook ohne Speichern schliessen


      ExcelWorkbook0.Disconnect;
      FreeAndNil(ExcelWorkbook0);

      // Excel beenden
      ExcelApplication0.Quit;
      ExcelApplication0.Disconnect;
      FreeAndNil(ExcelApplication0);
    end;

    Label_TargetFile.Caption:= SaveDialog2.FileName;
  finally
    Button_Save.Enabled:= False;
  end;
end;