ok thanks. I get it now. But now I came up with another question. How do i make it subtract and divide the datavalues selected on the droplists, then display them in a label? Is it also possible to make the answers Round up? (not down)

well to perform the math you have to convert the droplist values into numbers.because they(droplist values) always come in string format.use the VAL function to do the conversion like :-

dim a,b as integer
a=val(trim(combo1.text))
b=val(trim(combo2.text))

after this you can perform any mathematical operations like :-

dim subs as integer,divd as double
subs=a-b
divd=round(a/b)

use the ROUND() to round up any values.
then u can display the output like :-

label1.caption="Substraction :" & subs
label2.caption="Division :" & divd

hope it'll help.
regards
Shouvik