[DllImport("shlwapi.dll", EntryPoint = "PathGetArgsW",  SetLastError = True, CharSet= CharSet.Unicode)]

static extern System.Text.StringBuilder PathGetArgs([MarshalAs(UnmanagedType.LPTStr)]string pszPath);

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

Public Function PathGetArgs(<MarshalAs(UnmanagedType.LPTStr)>pszPath As String) As <MarshalAs(UnmanagedType.LPTStr)> System.Text.StringBuilder

Public Declare Function PathGetArgs Lib "shlwapi" Alias "PathGetArgsA" _

args = Win32.API.Shlwapi.PathGetArgs("c:\abc.exe 1 2 3 4")