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2.2 Message Syntax

Several structures and messages in the following sections refer to chapter or bookmarkhandles. A handle is a 32-bit long opaque structure that uniquely identifies a chapter or bookmark. Typically, client applications receive handle values via method calls. However, there are several well-known values that need not be obtained from a server, the meaning of which is specified in the following table.

Value

Meaning

DB_NULL_HCHAPTER

0x00000000

A chapter handle to the unchaptered rowset that contains all query results.

DBBMK_FIRST

0x00000001

A bookmark handle to a bookmark that identifies the first row in the rowset.

DBBMK_LAST

0x00000002

A bookmark handle to a bookmark that identifies the last row in the rowset.

 
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