In brief, I want to call OnTick from a DLL or even another process, in non-MQL language such as C++.
... and many, many others
Is there any document about the mystery MetaTrader4_Internal_Message?
Also I noticed the lParam in https://forum.mql4.com/62761/page2#954650 is 1 and is 0 in your https://forum.mql4.com/23961
What's the difference?
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