I didn't look in detail (I suspect the relevant details could be buried quite deep), but it looks likely to be a bug in Win32::API to me.

Even if not a bug in Win32::API, it looks like an uninitialized four-byte value is having only some of its bytes overwritten. So why not just work around it and pull out only the byte you care about? 

$ret &= 0xFF;

[download]

Though, the return values you show actually show the lowest two bytes being consistently 0x7298, which seems rather unlikely. 

printf "%d 0x%x\n", $_, $_
    for 53113496, 52195992, 52851352, 52458136, 51540632
53113496 0x32a7298
52195992 0x31c7298
52851352 0x3267298
52458136 0x3207298
51540632 0x3127298

[download]

...So it could easily be neither of the things I guessed. Is 0x98 (152) the value you are expecting to get?

- tye        

In reply to Re^3: How to use 'unsigned char' C data type with Win32::API (&255) by tye
in thread Solved: How to use 'unsigned char' C data type with Win32::API by sam_bakki

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