[RESOLVED] Color grouping datagridview rows

[make me rain]

i need to group the rows of a datagridview rows basing on values in column1
of DGV.

i mean for example while loop
if .Rows(TOPROW).Cells(0).Value =
.Rows(NextRow).Cells(0).Value then
color the rows with some unique color
else
color them differently

some peace of code pl