Connect Networkdrive

function ConnectDrive(_drvLetter: string; _netPath: string; _showError: Boolean;
  _reconnect: Boolean): DWORD;
var
  nRes: TNetResource;
  errCode: DWORD;
  dwFlags: DWORD;
begin
  { Fill NetRessource with #0 to provide uninitialized values }
  FillChar(NRes, SizeOf(NRes), #0);
  nRes.dwType := RESOURCETYPE_DISK;
  { Set Driveletter and Networkpath }
  nRes.lpLocalName  := PChar(_drvLetter);
  nRes.lpRemoteName := PChar(_netPath); { Example: \\Test\C }
  { Check if it should be saved for use after restart and set flags }
  if _reconnect then
    dwFlags := CONNECT_UPDATE_PROFILE and CONNECT_INTERACTIVE
  else
    dwFlags := CONNECT_INTERACTIVE;

  errCode := WNetAddConnection3(Form1.Handle, nRes, nil, nil, dwFlags);
  { Show Errormessage, if flag is set }
  if (errCode <> NO_ERROR) and (_showError) then
  begin
    Application.MessageBox(PChar('An error occured while connecting:' + #13#10 +
      SysErrorMessage(GetLastError)),
      'Error while connecting!',
      MB_OK);
  end;
  Result := errCode; { NO_ERROR }
end;

function ConnectPrinterDevice(_lptPort: string; _netPath: string; _showError: Boolean;
  _reconnect: Boolean): DWORD;
var
  nRes: TNetResource;
  errCode: DWORD;
  dwFlags: DWORD;
begin
  { Fill NetRessource with #0 to provide uninitialized values }
  FillChar(NRes, SizeOf(NRes), #0);
  nRes.dwType := RESOURCETYPE_PRINT;
  { Set Printername and Networkpath }
  nRes.lpLocalName  := PChar(_lptPort);
  nRes.lpRemoteName := PChar(_netPath); { Example: \\Test\Printer1 }
  { Check if it should be saved for use after restart and set flags }
  if _reconnect then
    dwFlags := CONNECT_UPDATE_PROFILE and CONNECT_INTERACTIVE
  else
    dwFlags := CONNECT_INTERACTIVE;

  errCode := WNetAddConnection3(Form1.Handle, nRes, nil, nil, dwFlags);
  { Show Errormessage, if flag is set }
  if (errCode <> NO_ERROR) and (_showError) then
  begin
    Application.MessageBox(PChar('An error occured while connecting:' + #13#10 +
      SysErrorMessage(GetLastError)),
      'Error while connecting!',
      MB_OK);
  end;
  Result := errCode; { NO_ERROR }
end;

function DisconnectNetDrive(_locDrive: string; _showError: Boolean; _force: Boolean;
  _save: Boolean): DWORD;
var
  dwFlags: DWORD;
  errCode: DWORD;
begin
  { Set dwFlags, if necessary }
  if _save then
    dwFlags := CONNECT_UPDATE_PROFILE
  else
    dwFlags := 0;
  { Cancel the connection see also at http://www.swissdelphicenter.ch/en/showcode.php?id=391 }
  errCode := WNetCancelConnection2(PChar(_locDrive), dwFlags, _force);
  { Show Errormessage, if flag is set }
  if (errCode <> NO_ERROR) and (_showError) then
  begin
    Application.MessageBox(PChar('An error occured while disconnecting:' + #13#10 +
      SysErrorMessage(GetLastError)),
      'Error while disconnecting',
      MB_OK);
  end;
  Result := errCode;
end;

// Connect Networkdrive
procedure TForm1.Button1Click(Sender: TObject);
begin
  ConnectDrive('N:', '\\Servername\C', True, True);
end;

// Disconnect Networkdrive
procedure TForm1.Button2Click(Sender: TObject);
begin
  DisconnectNetDrive('N:', True, True, True);
end;