报错如下：请各位大神帮忙看看，
[DCC Error] EhLibVCL.pas(737): E2003 Undeclared identifier: 'SMemoryStreamError'
[DCC Error] EhLibVCL.pas(758): E2003 Undeclared identifier: 'VarIsNull'
[DCC Error] EhLibVCL.pas(759): E2003 Undeclared identifier: 'Null'
[DCC Fatal Error] GridsEh.pas(24): F2063 Could not compile used unit 'EhLibVCL.pas'

uses
System.RTLConsts和System.Variants