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Message: [QUOTE="Willem, post: 3971372"] Seebs wrote: )> I'm wondering if I want to check if a bit is not set, )> the following statements are valid: ) )> /* check if bit is not set */ )> if ( !(MASK & BIT_TO_CHECK) ) )> { )> /* do something */ )> } ) ) This is. ) )> /* check if bit is not set */ )> if ( MASK & ~BIT_TO_CHECK ) )> { )> /* do something */ )> } ) ) No. This checks whether any other bits are set, which is not the same ) question. You can fix it though, by moving the ~ to a different location. SaSW, Willem -- Disclaimer: I am in no way responsible for any of the statements made in the above text. For all I know I might be drugged or something.. No I'm not paranoid. You all think I'm paranoid, don't you ! #EOT [/QUOTE]