Look at DesignPatterns, specifically Decorator and Strategy

>Hi everybody,
>
>I have a custom function (thanks to Cetin & Borislav) that produces an Excel from DBF and applies some additional formatting. This function is called from several modules and it uses an array of field names.
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>Now I have a need to add a certain color to some cells. For instance, we're sending the Excel file to third party and we want it to receive it with certain fields filled in. I want to add empty columns myself and I want them in the different color, so the third party would know, where new fields start.
>
>There could be several approaches:
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>1. Leave the original function in tact, create a new function to apply additional formatting and call both functions.
>
>2. Have some optional parameters in the original function.
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>I think, the second approach is better. I'm thinking, what kind of parameters would I need to add to the routine to make this generic enough?
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>What do you think?
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>Thanks in advance.