=item C<typedef NAME, TYPE, MEMBER, TYPE, MEMBER, ...>

idea 1:
typedef(POINTERNAME, EXISTING_TYPE)
or
typedef(NAME, TYPE, MEMBER, TYPE, MEMBER, ...) #legacy proto

with 

die "usage Win32::API::Struct->typedef( NAME, [NON_POINTER_STRUCT_NAME]
| [TYPE, MEMBER, TYPE, MEMBER, ...])" if scalar(@_) % 2 == 1 && scalar(@_) != 3; #or approx that, didn't run it

##</code><code>##

::Struct::typedef unchanged
::Struct::make_pointer($name, $existing_struct); # named after an existing private api sub in Win32::API (is_pointer)
#or decl_pointer instead of make_pointer?
#someone might think make_pointer returns an IV to the packed struct instance.

##</code><code>##

::Struct::typedef unchanged
$ret_bool = Win32::API::Struct::is_pointer($name [, $set_bool]) #name after private api in Win32::API::Type, proto is different though

##</code><code>##

typedef struct pvalueW {           // Provider supplied value/context.
    LPWSTR  pv_valuename;          // The value name pointer
    int pv_valuelen;
    LPVOID pv_value_context;
    DWORD pv_type;
}PVALUEW, FAR *PPVALUEW;