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CreateProcessWithLogonW(PWideChar(WideString(sUser)),
                                 PWideChar(WideString(sDomain)),
                                 PWideChar(WideString(sPassword)),
                                 LOGON_WITH_PROFILE, nil,
                                 PWideChar(WideString(sCommand)),
                                 CREATE_UNICODE_ENVIRONMENT, pEnvironmentBlock,
                                 aPath, rStartupInfo, rProcessInformation)					

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FillChar(SEI, SizeOf(SEI), 0);
  SEI.cbSize := SizeOf(SEI);
  SEI.fMask := SEE_MASK_NOCLOSEPROCESS;
  {$IFDEF UNICODE}
  SEI.fMask := SEI.fMask or SEE_MASK_UNICODE;
  {$ENDIF}
  SEI.Wnd := AWnd;
  SEI.lpVerb := 'runas';
  SEI.lpFile := PChar(Host);
  SEI.lpParameters := PChar(Args);
  SEI.nShow := SW_NORMAL;

  if not ShellExecuteEx(@SEI) then ....					

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procedure RunAsAdmin(hWnd: HWND; aFile: string; aParameters: string);
var SEI: TShellExecuteInfo;
begin
    FillChar(SEI, SizeOf(SEI), 0);
    SEI.cbSize := sizeof(SEI);
    SEI.Wnd := hWnd;
    SEI.fMask := SEE_MASK_NOCLOSEPROCESS;
    SEI.lpVerb := 'runas';
    SEI.lpFile := PChar(aFile);
    SEI.lpParameters := PChar(aParameters);
    SEI.nShow := SW_SHOWNORMAL;  // SW_SHOWNORMAL; SW_HIDE; SW_MAXIMIZE;
    if not ShellExecuteEx(@SEI) then RaiseLastOSError;
end;

procedure TForm1.Button3Click(Sender: TObject);
var strParams, PN : String;
begin
  PN:= ExtractFilePath(ParamStr(0))+ 'ZielProg.exe';
  strParams:= ' '+Edit1.Text+' '+ Edit2.Text;  //' Benutzername Kennwort';
  RunAsAdmin(Application.Handle,PN, strParams);
end;