Reverse HLookup?

[GregHastings]

Hi Folks;

I am putting a level scheduling spreadsheet together, where I want to slide schedule hours left and right on the row.  At the top are the dates.  So I want to see where the first occurrence of hours occur in a row (project start), and then look at the date in that column at the top of the page, then put that date in a cell on another page.  I also want to look at the last occurrence of hours in a row and look at the date at the top of that column (project End).

With HLookup, I can find a date at the top of the page, and then look at the value in another row, but I can't go the other way.  Any ideas?

Thanks,

Greg

[#2]

@GregHastings 

Hi Greg,

If that's something like this

formula for Start date

=INDEX($A$1:$L$1,0,
    MATCH(1,INDEX(
        ISNUMBER(INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0))*
        (INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0)>0),
    0),
0))

for End date

=LOOKUP(2,1/(INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0)>0),$A$1:$L$1)