WM_COPYDATA can MT5 work with it ?

[Stefano Cerbioni]

Hi aony one  have experience  about  exchange data to WM_COPYDATA ?   exist some library  i not find nothing about it in forum , i must create a dll for work with this ? 

[Stanislav Korotky]

Probably, it's doable using Windows built-in DLLs (you can find MQL examples of information exchanging with other messages), but there exist many other ways to send/receive data (pipes, sockets, etc). If you describe your specific task with more details (between which programs to exchange, required timing, network/local, etc), someone could suggest already available solution.