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Asked: May 10, 20262026-05-10T21:49:17+00:00 2026-05-10T21:49:17+00:00

I’m trying to set an invalid value to -1.. But I don’t like magic

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I’m trying to set an invalid value to -1.. But I don’t like magic numbers.. Anyone know where to find a set of common constants. I’m working in VS6 (ish).

I’m trying to read a file from across a network, and I need a bad value for the total file size,so I know if I got valid info on it.. 0 is a valid size so I can’t use that.

Harper Shelby HIT THE NAIL ON THE HEAD.. Just a little thumb. He mentioned the win32 constants.. which is exactly what I was thinking about.. Now to find a link 🙂

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  1. 2026-05-10T21:49:18+00:00Added an answer on May 10, 2026 at 9:49 pm
    #define BAD_VALUE -1 

    EDIT: the original question had no context. The revised question indicates you want an invalid file size and are thus looking for the win32 constants. Look at windows.h i think the constant you seek may be in windows.h or one of its sub-includes. grep your windows include directory 😉

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