I want to call a mymodule.functions.inc file Hi all drupalers i am new in drupal coding i wrote a new drupal module that works perfecr but my boss wanted to put all my functions of my .module file in a new folder called 'includes' and in a files that called mymodule.functions.inc now i got an error in my code that says called of undefined function... How I can call this mymodule.functions.inc file in my mymodule.module file?? I need a real help hear guys plz help me out :)
You need to use the module_load_include function.

EDIT: As @Darvanen mentions this needs to go in your .module file preferably inside a suitable hook. Have you seen the Including code section of the Coding standards page?