Discussion of article "A DLL-free solution to communicate between MetaTrader 5 terminals using Named Pipes" - page 3

[Vladimir Simakov]

Taking into account the fact that mql4/5 lacks the possibility of multithreading, making a server on mql4/5 is like watching a tube TV (it seems to work, but the feeling is not the same. That's why it's better to write a separate server and use it to transfer data between mql programs.

[Flying Dutchman]

Hi, is this still a working product? If not, can it be updated to work under the latest MT5 build? Right now it's throwing an 'Access Violation'

[sonaht]

I also faced access violation errors when calling the methods writeTick, readTick... and so on. Find the  fixed CNamedPipes file attached. 

I also added the WriteDouble Method to the CNamedPipe Class:

#import "kernel32.dll"
...
int WriteFile(ulong fileHandle,double &var,int bytes,int &numOfBytes,ulong overlapped);
...
#import

...

bool CNamedPipe::WriteDouble(double data)
  {
   int data_size = sizeof(data);
//--- check parameters
   if(!data || data_size<1) return(false);

//--- send data
   int written;
   if(!WriteFile(hPipe,data,data_size,written,NULL) || written!=data_size)
      return(false);
//--- ok
   return(true);
  }

Side Note: To read/write on Client Side (e.g from another Metatrader Terminal ), I just used the standard MQL5 FilePipe Library. Examples how to use them can be downloaded here: 

https://www.mql5.com/en/articles/503

[Emilio Reale]

fantastic work

[Adam John Bradley]

It's been a while since there was an update here... I'm seeing "Access Violation" error when I attach the indicator to the chart. Guess there's no way to make this work.