Functions and Directives Functions and Directives

Function _conGetND() Foundation

Reads the value of a numeric container as a floating point number.

Syntax
XPPAPIRET _conGetND(ContainerHandle chn, double *ndValue);
Parameters
ContainerHandle chn
Handle of a container with a numeric value.
double *ndValue
Pointer to a buffer of type double into which the value of the numeric container is to be written.
Return

The function returns an error code (XPP_ERR_...) when the container chn is not of numeric type. If the return value is NULL the operation was successful.

Description

The function _conGetND() accesses the value of a container of numeric type. The value is written into a buffer of double type. The data type double can take any numeric value permitted in Xbase++.

Examples
/* 
Determines the numeric value of a container. 
*/ 
#include <xppcon.h> 

ContainerHandle  hNumeric; 
XPPAPIRET        xr; 
double           ndValue; 

/* Assigns a value to ... hNumeric */ 

xr = _conGetND(hNumeric, &ndValue); 
if (xr == 0) 
{ 
/* ... operations with the double value */ 
}
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