"qjol" you helped me again!
Thank you for all support!
Two fast questions:
I couldn´t read anywhere that I have to compile the "*.mqh" file, should I?
- When I downloaded a file https://c.mql5.com/mql4/book/mq4/include/check.mqh according to a guide, the compiler complained about "start function not run", but I could see a compiled file. Also the "include <blabla.mqh>" refers to a mqh-file, so it had to be uncompiled?!?
Is it ok to have more than 1 function in 1 mqh-file?
- This maybe a dumb question... But I rather ask...
Two fast questions:
I couldn´t read anywhere that I have to compile the "*.mqh" file, should I?
no need
- When I downloaded a file https://c.mql5.com/mql4/book/mq4/include/check.mqh according to a guide, the compiler complained about "start function not run", but I could see a compiled file. Also the "include <blabla.mqh>" refers to a mqh-file, so it had to be uncompiled?!?
Is it ok to have more than 1 function in 1 mqh-file?
yes
- This maybe a dumb question... But I rather ask...
Is it possible to create an EA/indicator/script, that has my "best of functions" that I can "Call/use" for my indicators and EA (like a DLL). So I don´t have to add these functions in every EA or indicator, maybe just "include" this in the header?
I practice storing as many re-usable functions as I have, into "Master" library, then create header for different combination calls. I surely recommend this approach. Its time-saving, and convenient, verily.
You mean a mqh-file? If not, could you give me a simple example?

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Is it possible to create an EA/indicator/script, that has my "best of functions" that I can "Call/use" for my indicators and EA (like a DLL). So I don´t have to add these functions in every EA or indicator, maybe just "include" this in the header?