Creating square from given latitude and longitude data

Hi, I am creating an application where I need a feature to display cells or say square of 300 X 300 foot on MapInfo files. I have a list of Latitude and Longitude that will be used in cell creation . Concept is that very first latitude and longitude will work the base for others. 1- Take very first latitude and longitude , assume it center latitude-longitude and create a square of 300 X 300 foot around this. 2-Take next latitude and longitude find the location where they will be placed (in which direction)to the square created in step 1 and create another square .This means there is no gap between two square. [ There is possibility of overlapping so you need to avoid that. It is better if you could create a map info file that just create square without taking care of overlapping and another file that will take care of overlapping.] 3- follow step 2 to create all square from remaining latitude-longitude. Latitude -longitude will be stored in sql server. Create a map info tab file and write C# code to create square. You will need MS-sql server 2005, visual studio 2008(ASP.net,C#),map-info development environment ( so that you can take refrence of mapinfo library to create square on mapinfo files). I need complete working code. Thanks