Re: pack()ing Win32 Structures

A couple of things -

'u' in the pack template is UUEncoded text, I think you want 'U' for unicode, right? The template you are looking for should be "LU32PLU32PL"

Instead of " " x 32, pass a list of 32 32's, for example:

    push @splist, 32 for (1 .. 32);
    $tz_struct = pack("LU32PLU32PL", 0, @splist, $systime_struct,
                                        0, @splist, $systime_struct, 0
+);
[download]

'P' and 'N' are constants defined in Win32::API, not strings. The third parameter to new Win32::API should be an anonymous list or an array reference, not a string literal
'GetTimeZoneInformation', [P], N
[download]
Have fun unpacking the unicode string! If all you are interested in is the bias, try "LS64PLS64PL" for the template.

Update:

Updated my Win32::API, and updated #3 above. Thanks mothra:-)
BTW, $bias returns 480 after making the above modifications (UTC -8)

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Re: Re: pack()ing Win32 Structures by mothra (Hermit) on May 06, 2002 at 02:27 UTC
'P' and 'N' are constants defined in Win32::API, not strings. The third parameter to new Win32::API should be an anonymous list or an array reference, not a string literal `'GetTimeZoneInformation', [P], N` [download] FWIW, according to the documentation, string literals are allowed for specifying the types of the parameters.	[reply] [d/l]
Re: Re: Re: pack()ing Win32 Structures by jsprat (Curate) on May 06, 2002 at 03:55 UTC
You must have a newer version of Win32::API than I do. The docs in mine say: `The third parameter, the input parameter list, specifies how many arguments the function wants, and their types. It MUST be passed as a list reference.`	[reply] [d/l]