The code examples below show how to call an Erlang DLL Function. In this example, the blocking probability is being calculated using the Erlang C model. The inputs are the number of servers (i.e.. circuits), and the total offered traffic (in Erlangs).

ANSI C

#include “dll_erlc.h”

int	  iNumServ  = 12;
double	  dErlangs  = 10.0;	//Erlangs
HINSTANCE hErlangCDLL;
double 	  dProb;

hErlangCDLL = LoadLibrary(“erlangc.dll”);
dProb = ERLC_CalcProb(dErlangs, iNumServ);
FreeLibrary(hErlangCDLL);


Visual Basic

Private Declare Function ERLC_CalcProb Lib "c:\erlangc.dll" 
 (ByVal dErlangs As Double, ByVal iNumServ As Long) As Double

Dim iNumServ As Long
Dim dErlangs As Double
Dim dProb As Double

iNumServ = 12
dErlangs = 10.0		‘Erlangs
dProb = ERLC_CalcProb(dErlangs, iNumServ)

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Last modified: March 25, 2015