I suspect that you are on an architecture that insists that a long() must begin on a word boundary (the address%4 = 0). When you inserted the char(), you moved the next available memory position off of a word boundary, and so you get the three slack-bytes inserted. If you positively must have the smallest in-memory foot-print, then order the components of your struct in order of decreasing alignment -- float/double before long before half-word before int/char/byte.

----
I Go Back to Sleep, Now.

OGB

In reply to Re: Win32::API::Struct problem by Old_Gray_Bear
in thread Win32::API::Struct problem by ldln

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