the return of Function Pointers

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I posted a question about pointers to functions a little while ago, ('Pointers to Functions') and was satisfied with the responce I got untill I came across this in the documentation:

https://docs.mql4.com/constants/errors
ERR_WRONG_FUNCTION_POINTER 4001 Wrong function pointer.

There must be a way, but for the life of me, I can't figure it out.

does any one know where I might send an e-mail to contact the people who wrote the error so I can find out the syntax for a function pointer?

[Slava]

Please read documentation. https://docs.mql4.com/runtime/errors 4001 is internal runtime error

and read https://docs.mql4.com/basis/syntax - "no address arithmetic" ie no pointers.

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*sigh*

thank you.