Total up a datagrid to a separate textbox

Hi Steve, not sure exactly what you are asking but I'll take a stab with my best guess.  I don't have vb 2005 but think this should be useful if it goes to the question you have.
lets say we have a datgridview called "DGV1" which has three columns and three rows.  The first cell (upper left hand cell) would be DGV.item(0,0) where (0,0) are:
(columnIndex as Int, rowindex as Int).
 
to sum the rows and/or colums you would simply need to create a loop or a couple of loops with counting variables that would cycle through the rows/columns adding the value of each cell to the running total example:
the following example will sum a row
'subtract 1 from rowcount because first cell index 0, so last cell will have index 2 (0, 1, 2)

 
for r = 0 to DGV1.columncount -1
   runTotal = runTotal + DGV1.item(r,0).value
next
 
textbox1.text = runTotal

to sum a column instead of a row, you would change runTotal in the loop to be:

 
for c = 0 to DGV1.rowcount -1
   runTotal = runTotal + DGV1.item(0,c).value
next
 
textbox1.text = runTotal

to sum all cells in the table:

 
for r = 0 to DGV1.rowcount -1 
   for c = 0 to DGV1.columncount -1
      runTotal = runTotal + DGV1.item(r,c).value
   next
next
 
textbox1.text = runTotal