How can I word wrap text for printing?

[aspro]

I am using printdocument to print strings that come directly from a database. The problem I have is that the strings are usually longer than the page margins so when it prints it simply cuts the string so that you only see what fits on the one line. I have calculated how many lines there can be one the page but I cannot figure out how to add a hard enter to a string when it is too long for the page. I thought maybe if I could split the string into multiple ones then they would all fit but I can't really see how to do this either.
If anyone can give me some help it would be greatly appreciated,

aspro.