static extern bool PathIsNetworkPath(string pszPath);

<DllImport("shlwapi.dll", EntryPoint:="PathIsNetworkPathW",  SetLastError:=True, CharSet:=CharSet.Unicode)> _

Public Function PathIsNetworkPath(<MarshalAs(UnmanagedType.LPTStr)>pszPath As String) As <MarshalAs(UnmanagedType.Bool)>Boolean

Public Declare Function PathIsNetworkPath Lib "shlwapi" Alias "PathIsNetworkPathA" _