This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.
This function tries to find the function_name function in libary, and tries to import it into PHP. The function will be registered with the given return_type. This type can be a generic PHP type, or a type defined with w32api_deftype(). All type names are case sensitive. Built in type names should be provided in lowercase. Returns TRUE on success or FALSE on failure.