Looking for tide calculation algorithm

I'm looking to incorporate the calculation of high and low tides into my Delphi
software. For this I need algorithms telling me how to calculate the time of
high and low tides. Do you know where I can get such algorithms? I understand
it will probably involve complex calculations to find the position of the sun
and moon in relation to the earth and I am prepared for that.

I have searched the web and have not found any algorithms yet, just sites that
calculate tides for the oceans. I am making software to calculate the best
fishing times, which has something to do with the tides. So I would have to be
able to calculate the high and low tides for an INLAND location based on
latitude and longitude.


Thank you.


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