Converting Visio Diagrams to TIFF

////////////////////////////////////////////////////////////////////////////////////////////////////
// This example was designed for using in Delphi 7 or higher.
//
// 1. Microsoft Visio 2002 or above should be installed and activated on your PC.
//
// 2. Universal Document Converter 5.2 or above should be installed, too.
//
// 3. Add "Universal Document Converter Type Library" and "Microsoft Visio XX.0 Object Library" type libraries to the project.
//    XX is the Microsoft Office version installed on your computer.
//
//    Delphi 7:
//      Use the Project | Import Type Library menu.
//    Delphi 2006 or latter:
//      Use the Component | Import Component menu.
//
//    Clear the "Generate Component Wrapper" checkbox and click the "Create Unit" button (Delphi 7) or
//    select the "Create Unit" option (Delphi 2006 or latter).
//
// 4. Notice that the number of Microsoft Visio's method parameters may depend on the Office version.
//
////////////////////////////////////////////////////////////////////////////////////////////////////

program VisioToTIFF;

{$APPTYPE CONSOLE}

uses
  SysUtils,
  Variants,
  Windows,
  Dialogs,
  ActiveX,
  UDC_TLB,
  Visio_TLB;

procedure PrintVisioToTIFF(VisioFilePath: string);
  var
    objUDC: IUDC;
    Printer: IUDCPrinter;
    Profile: IProfile;
    VisioApp: IVApplication;
    Document: IVDocument;
    Flags: SmallInt;
  begin
    //Create a UDC object and get its interfaces
    objUDC := CoAPIWrapper.Create;
    Printer := objUDC.get_Printers('Universal Document Converter');
    Profile := Printer.Profile;

    //Use Universal Document Converter API to change settings of converterd document
    Profile.Load('C:\Program Files\Universal Document Converter\UDC Profiles\Drawing to TIFF.xml');

    Profile.OutputLocation.Mode := LM_PREDEFINED;
    Profile.OutputLocation.FolderPath := 'c:\UDC Output Files';

    Profile.PostProcessing.Mode := PP_OPEN_FOLDER;

    //Run Microsoft Visio as COM-server
    VisioApp := CoVisioApplication.Create;

    VisioApp.Visible := True;

    //Open document from file
    Flags := visOpenRW or visOpenDontList or visOpenMacrosDisabled or visOpenHidden;
    Document := VisioApp.Documents.OpenEx(VisioFilePath, Flags);

    //Change document preferences for scaling it to page
    Document.PrintCenteredH := True;
    Document.PrintCenteredV := True;
    Document.PrintFitOnPages := True;

    //Print document
    Document.Printer := 'Universal Document Converter';
    Document.Print();

    //Close document
    Document.Saved := True;
    Document.Close();

    //Close Visio
    VisioApp.Quit();
  end;

var
  TestFilePath: string;
begin
  TestFilePath := ExtractFilePath(ParamStr(0)) + 'TestFile.vsd';
  try
    CoInitialize(nil);
    try
      PrintVisioToTIFF(TestFilePath);
    finally
      CoUninitialize;
    end;
  except
    on E: Exception do
      MessageDlg(E.ClassName + ' : ' + E.Message, mtError, [mbOK], 0);
  end;
end.