( string library, string function_name, string return_type )
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.