static extern bool PathMatchSpec([In] string pszFileParam, [In] string pszSpec);

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

Public Function PathMatchSpec(<MarshalAs(UnmanagedType.LPTStr)>pszFile As String, _

    Private Declare Auto Function PathMatchSpec Lib "shlwapi" _

if(PathMatchSpec("C:\\test.txt", "*.txt"))

    Return PathMatchSpec(sFile, sSpec)

    MatchSpec = PathMatchSpec(sFile, sSpec)