Keef, rotorcraig and temet_nosce - Thank you! I played around with all three ideas and have it working better than I actually wanted it to, so thanks again.
Telstar - Ive tried one store bought logbook and did not like it at all, which is why I decided to program my own, that and I dont need it to conform to JAR, FAA, TC regs. I also wanted the challenge of writitng all the formulas myself and seeing the end result. After all, pilots all cant just be pretty faces in the crowd