How to create dll

Any of those languages can be used. You should google it, since it's outside the scope of this forum.

After you create a dll you need to import it before using it. See -> https://docs.mql4.com/basis/preprosessor/import

C, standard DLL

Sample code included with every MT4 install... \experts\samples\DLLSample

hi mine doesn't have that folder where can i get it!?

tnX

Beware, you cant use dll in  MT4 VPS, before you go too far down that track.. ?

\Scripts\Samples\DLL\DLLSample.cpp