Help! having problems with macros/coding

[Derrick]

I want to make a macro that will create a dropdown list of steel members that
are acceptable. the easiest way to explain is with an example...
2 sheets: Verticals, Steel
Verticals:
A B C D E F
1 Deflection Steel
2 Allow Actual Needed Description Ix Weight
3 .5 .4 (dropdown1)
4 .32 .25 (dropdown2) 2X3 BAR 3 5
5 .5 1.3 (dropdown3) 4X3 BAR 6 8

Steel:
A B C D
1 Item Description Ix Weight
2 1 1X2 BAR 1 2
3 2 2X3 BAR 3 5
4 3 4X3 BAR 6 8

(Dropdown1)=
-"NONE NEEDED"
(Dropdown2) =
- "2 - 1X2 BAR"
- "3 - 4X3 BAR"
and displays "2" when selected
(Dropdown3) =
- "3 - 4X3 BAR"
and displays "3" when selected

ok. So the point of all this is to have a macro that will go through my
steel sheet after doing my calcs to see if the defl works with the properties
Ix & Weight.. and display a dropdown list in the "Steel Needed" column.
i was thinking something like this: (but i dont know VBA)

C3,C4,C5=

if Defl Actual> Defl Allowable then
for (x=1, to 'Last item on Steel sheet', x++)
'check defl with formula, using item 'x' properties
if 'defl with Steel' < Defl Allowable then
' add to dropdown list
end if
end loop
else Steel Needed = "No Steel Needed"
end if

next:
if item '3 (for example)' is selected then
display '3' in cell (not '3 - 4x3 BAR')
end if

can anyone help? ive posted this before, and nobody's responded..
thanks so much.
Ps. If this is posted twice, its because there was an error posting and i
dont know if it actually posted.