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ADOConnection1->OpenSchema(siViews, EmptyParam, EmptyParam, ADODataSet1);

First parameter is schema - in this example Views.

Second - Restrictions - for example, if you get columns schema (siColumns)
you could get columns for all tables, or specify restiction and get columns
for concrete table - every schema defines its restrictions. Use EmptyParam
for no restrictions. Otherwise Restrictions is Variant that contains array
of Variants with restrictions.

Third - GUID of schema - if your provider have a schema that is not in
enumeration, enter its GUID here. Use EmptyParam is usual.

Fourth - TADODataSet in which schema is returned.

Regards,
Vassiliev V.V.
http://www.oledbdirect.com

"Mortalpain" <mortalpain@mortalpain.net> �������/�������� � ��������
���������: news:3c987417$1_1@dnews...
> hi~ all.
>
> i'm trying to use openschema method.
>
> but it's very difficult.... specially second and third parameters
>
> for example
>
> void __fastcall OpenSchema(const TSchemaInfo Schema, const OleVariant
> &Restrictions, const OleVariant &SchemaID, TADODataSet * DataSet);
>
> what is const OleVariant &Restrictions ?
>
> and what is const OleVariant &SchemaID ?
>
> help is lack of explainations....
>
> there are in My source
>
> OleVariant Restrictions = WideString("TABLE_NAME");
>
> objConn->OpenSchema(siTables, Restrictions, NULL, objRsSchema);
> objRsSchema->Open();
>
> help me please....
>
> Good Programming and all happy~ :-)
>
>