[DllImport("shlwapi.dll", EntryPoint = "PathStripToRootW",  SetLastError = true, CharSet = CharSet.Unicode)]

static extern bool PathStripToRoot([MarshalAs(UnmanagedType.LPTStr)]string pszPath);

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

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

Public Declare Function PathStripToRoot Lib "shlwapi" Alias "PathStripToRootA" _