Need some help with CString and LPCSTR

Hello,
I would like to change  the name of the printer into a  string.
This is my code that works:
if (GetPrinterDevice(_T("\\\\DSERVER\\Brother HL-7050 series"), &hDevNames, &hDevMode))


I have tried this one, but it will not work:


void CZahlen_SortierenDlg::OnBnClickedButton1()
{
       HANDLE hDevMode;
     HANDLE hDevNames;

       CString D="\\\\\\\\DSERVER\\\\Brother HL-7050 series";
       LPCSTR drucker=(LPCSTR)(LPCSTR)D;


// if (GetPrinterDevice(_T("\\\\DSERVER\\Brother HL-7050 series"), &hDevNames, &hDevMode))


 
 
   if (GetPrinterDevice(drucker), &hDevNames, &hDevMode)
      
     {
          AfxGetApp()->SelectPrinter(hDevNames, hDevMode);

          CPrintDialog dlgPrint(FALSE,PD_PAGENUMS|PD_USEDEVMODECOPIESANDCOLLATE , this);

               //--------------------------- Papier Auswahl DEVMODE ----------------------------------
          if(AfxGetApp()->GetPrinterDeviceDefaults(&dlgPrint.m_pd))
          {               
              LPDEVMODE dev=dlgPrint.GetDevMode();
                GlobalUnlock(dev);
                            
                   dev->dmOrientation=DMORIENT_PORTRAIT;  //Hochformat
                  dev->dmPaperSize=DMPAPER_A4;
               
                dev->dmCopies=1;  
                dev->dmDefaultSource=DMBIN_AUTO;


I will get this error:
Thank you for your help,
Best regards,
Thomas