# C-Library File IO Routines

PVK_RegisterKey( ) | Register Usage of Library

## Format

int PVK_RegisterKey(HPVKENV hEnv, char *reg_str, long reg_num);

Where:

hEnv | Handle to environment structure created by PVK_AllocEnv( )
reg_str | Registration string provided by PVX Plus Technologies Ltd.
reg_num | Registration number provided by PVX Plus Technologies Ltd.

## Description

PVK_RegisterKey( ) must be called prior to opening the first file in order to provide the DLL with a valid registration string and key. Without this registration information, a warning message that requires user intervention will be displayed whenever a file is opened.

#### Note:
The PXPIO routines are not to be redistributed as part of any application without first having purchased and obtained a proper registration string and number from PVX Plus Technologies Ltd.