winapi - In Ruby's Win32API.new, isn't 'L' the same as 'I', and what about 'N' or 'P'? -

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in documentation, ruby's win32api has 'l' , 'n' specify "number"... , in documentation, 'l' "long". 'n' deprecated, , isn't 'l' same 'i' actually? "number" not specific.

in http://rubyforge.org/docman/view.php/85/3463/api.html#m000001

there no specifying boolean parameter 'b' or 'i', return value...

in http://www.ruby-doc.org/stdlib/libdoc/win32api/rdoc/classes/win32/registry/error.html#m001622

there is

 win32api.new('kernel32.dll', 'formatmessagea', 'lpllplp', 'l')

instead of more common ['l', 'p', 'l', ...] format

hwnd 'l' , therefore 'i' work too? (hwnd handle window)

boolean parameter 'b' , same 'i'?

so basically, can use things 'i'? 'p' should 4-byte, 'i' should work well? there more formal specification?

update: think more 'p', use ruby's string class object, , take content buffer part , pass c function. using 'i' won't trigger behavior. (example: such using getwindowtext())

i'm looking @ win32-api source code, , looks difference between 'l' , 'i' 'l' calls rb_num2ulong , 'i' calls rb_num2int in <ruby.h>. guess difference treatment signed value or not. 'p' results rb_num2ulong, follows additional logic stick documentation suggests. coudln't find mention of 'n' in latest version of win32-api (1.4.5), it's deprecated. windows apis not return boolean, return bool (surprise! ) int. in short, don't think should use 'i' everything. win32-api documentation pretty scant i've seen. @ least source code available browsing.


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