can you access that directory via file explorer? If not than programmatic approach will fail also.
this code should not compile
CFileDialog.m_ofn.lpstrInitialDir = _T("\\\\192.168.1.1\\Log")
and on the other hand this will create an inaccessible temporary variable
CFileDialog().m_ofn.lpstrInitialDir = _T("\\\\192.168.1.1\\Log")
also unicode paths formed like so:
L"\\\\?\\My Folder"