Style_Id --> User_Field_Defs

Looking at the database I'm trying to determine the type of a user defined field(UDF). I figured out where to look, the style_id field in the User_Field_Defs table... but I don't totally understand it... It is a lot to type it all here so if you have the book look up the table... it has a high and low value, i get the first part or 'High Word' has the hex value of the type of the field but I don't understand the rest which are 'Low Words', are they adding them together or something... a few examples of how the are putting them together would be great!!!!

Thanks in Advance...
dotnetme2