hi every one:
today my supervisor asked me to choose a version of vb to start developing my project . honestly speaking I am so lost which version to choose" vb" or" vb.net 2005".
honestly my oop programing is not good at all and I have one and half month to develop this project which is about:

the designers of products are the user and they are able to choose their materials and refrence number from database (excel sheets) and they enter the quantity for the materials finally the program does some "eco design " calculations based on specific formulas and give them some eco design parameter _ also graphical illustration

please help me which version I should choose
thanks in advance