Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

uses
   Word_TLB, ActiveX, ComObj;

 function GetRTFFormat(DataObject: IDataObject; var RTFFormat: TFormatEtc): Boolean;
 var
   Formats: IEnumFORMATETC;
   TempFormat: TFormatEtc;
   pFormatName: PChar;
   Found: Boolean;
 begin
   try
     OleCheck(DataObject.EnumFormatEtc(DATADIR_GET, Formats));
     Found := False;
     while (not Found) and (Formats.Next(1, TempFormat, nil) = S_OK) do
     begin
       pFormatName := AllocMem(255);
       GetClipBoardFormatName(TempFormat.cfFormat, pFormatName, 254);
       if (string(pFormatName) = 'Rich Text Format') then
       begin
         RTFFormat := TempFormat;
         Found := True;
       end;
       FreeMem(pFormatName);
     end;
     Result := Found;
   except
     Result := False;
   end;
 end;

 procedure WriteToMSWord(const RTFText: String);
 var
   WordDoc: _Document;
   WordApp: _Application;
   DataObj : IDataObject;
   Formats : IEnumFormatEtc;
   RTFFormat: TFormatEtc;
   Medium : TStgMedium;
   pGlobal : Pointer;
 begin
     try
       GetActiveOleObject('Word.Application').QueryInterface(_Application, WordApp);
     except
       WordApp := CoWordApplication.Create;
     end;
     WordApp.Documents.Add(EmptyParam, EmptyParam, EmptyParam, EmptyParam);
     WordApp.Visible := True;
     WordDoc := WordApp.ActiveDocument;
     OleCheck(WordDoc.QueryInterface(IDataObject,DataObj));
     GetRTFFormat(DataObj, RTFFormat);
     FillChar(Medium,SizeOf(Medium),0);
     Medium.tymed := RTFFormat.tymed;
     Medium.hGlobal := GlobalAlloc(GMEM_MOVEABLE, Length(RTFText)+1);
     try
      pGlobal := GlobalLock(Medium.hGlobal);
      CopyMemory(PGlobal,PChar(RTFText),Length(RTFText)+1);
      GlobalUnlock(Medium.hGlobal);
      OleCheck(DataOBJ.SetData(RTFFormat,Medium,True));
     finally
       GlobalFree(Medium.hGlobal);
       ReleaseStgMedium(Medium);
     end;
 end;

 procedure TForm1.Button2Click(Sender: TObject);
 begin
   WriteToMSWord(Memo1.Text); // may be rtf-formatted text 
end;