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Hello,

The MT4 documentation says you can create a function with optional parameters thus:


void example (int a, int b=0);


Then, according to the documentation, it should be possible to call the function thus:


example (15);


and 0 should be substituted for the second argument. Instead, I keep getting the error:


')' wrong parameter count.


What am I overlooking here? Is there any documentation or book that is more detailed than the MT4 online documentation, maybe?

Oh, and here a very important detail. The problem occurs only if the function is external, residing in a library file, and the above declaration is in an mqh file. The library file will compile fine, but the error occurs in the calling expert.

If the function is defined and used in the expert, it seem to work fine.

Thanks for any help