reh052965reh052965 2005.04.12 09:37 

First, how can I submit a very simple example of how to use a DLL in MT4? The example is written in assembly and displays the T3 moving average using a simple moving average filter.

I believe another individual stated having the same problem, but I would like to make sure the issue is addressed in the next release of MT4 (165). The MQ4 code below loads properly initially, but changing the time frame causes a critical error rapidly closing the critical error window and the MT4 Client. The example below is using a DLL; however, this DLL worked fine in MT4 163 and started the aberrant behavior after allowing the update to 164.

#property copyright ""
#property link      ""

#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1  Yellow

#include <UniTest.mqh>

extern int    T3Period = 5;
extern double T3Ring   = 0.25;
//---- indicator buffers
double aLine[];

//+------------------------------------------------------------------+
//| expert initialization function                                   |
//+------------------------------------------------------------------+
int init()
{
   IndicatorBuffers(1);
   IndicatorDigits( MarketInfo( Symbol(), MODE_DIGITS ));
   SetIndexStyle(0, DRAW_LINE);
//---- indicator buffers mapping
   if( !SetIndexBuffer( 0, aLine ))
      Print( "cannot set indicator buffers!" );
//----
   SetIndexDrawBegin( 0, 12 );
//----
   IndicatorShortName( "UniTest" );
//----
   return(0);
}
//+------------------------------------------------------------------+
//| array functions call                                             |
//+------------------------------------------------------------------+
int start()
{
   int limit, i, j;
   int cntBars = IndicatorCounted();
   double lvl00, nArray00[50];

   limit = Bars - cntBars;
   for( i = 0; i < limit; i++ )
   {
      for(j = 0; j < 50; j++)
      {
         nArray00[j] = Close[i + j];
      }
      lvl00 = T3(T3Period, T3Ring, nArray00);
      aLine[i] = lvl00;
   }

   return(0);
}
//+------------------------------------------------------------------+