A question about bit masks

What I'm ultimately attempting to do is determine if a box is checked in an a tree view. I was using something to the effect of

Code:

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if (tvi.state == INDEXTOSTATEIMAGEMASK(2))

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But that doesn't work if it has any other properties, like children items because it has flags determining weather it's expanded and so on. So how can I just compare "bits 12-15" as that's what MSDN says determines the state image.

Try

Code:

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if ((tvi.state & INDEXTOSTATEIMAGEMASK(2))== INDEXTOSTATEIMAGEMASK(2))

---

:)

And a value with a known bitmask: it sets bits on only if the bits are both 1's in both operands. You should end up with the result equalling the original bit mask -

Just like crtptctctc..etc showed you. If I had a name like that I think I'd like 'Joe' better - it's easier to spell.

If you code in C or C++ you have to know about &, |, ^, <<, >>
and exactly what they do.

Why is crptcblade hard to spell? :D

Crtpcblade, thanks that worked perfectly :)