How to select multiple columns

I am using VBA to change the format of columns. The code work with 1 column, but In need to change the format of mulitiple columns. E.g Cols 11 to 22. I tried the code below but it does not work!

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This code works

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but is only for one column!

Thanks,

Dave32

Thanks SHG, you beat me to it, I also just managed to find the answer by trail and error.

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