xHarbour Reference Documentation > Function Reference

RddRegister()

Registers a user defined Replaceable Database Driver (RDD).

Syntax

RddRegister( <cRddName>, <nRddType> ) --> nErrorCode

Arguments

<cRddName>

This is a character string holding the name of the RDD to register in xHarbour's RDD system.

<nRddType>

This is a numeric value indicating the type of the RDD to register. #define constants contained in RDDSYS.CH are used for this parameter.

Types of RDDs

Constant	Value	Description
RDT_FULL	1	RDDs with full functionality
RDT_TRANSFER	2	RDDs having only import/export capabilities

Return

The function returns a numeric error code indicating a successfull RDD registration.

Return values of RddRegister()

Value	Description
0	RDD is successfully registered
1	RDD is already registered
>1	RDD is not registered due to error

Description

RddRegister() registers a user-defined RDD in xHarbour's RDD system. The easiest way of registration is to call the function from within an INIT PROCEDURE, so that the registration occurs automatically at program start.

Refer to the files in \source\rdd\usrrdd\rdds for examples of RDD registration.

Info

See also:	RddInfo(), UsrRdd_ID()
Category:	Database drivers , User-defined RDD , xHarbour extensions
Header:	usrrdd.ch
Source:	rdd\dbcmd.c
LIB:	lib\xhb.lib
DLL:	dll\xhbdll.dll