My question is about how to determine a cell location, I mean, if I use:
ActiveSheet.Shapes.AddLine(2, 2, 10, 10)
Then the location starts at 2,2 and ends at 10,10, but if I want that the
line starts at the center of cell A5 and ends at the center of C10 ¿How to
accomplish it???
I need the preceding because I have a sheet with numbers:

A B C D
1 1
2 2 0 1
3 3 1 2
4 4 2 3
5 5 3 0 4
6 6 4 1 5
7 7 5 2 6

And this numbers represent grades of an especial test, each test (columns)
has its own numeric scale (rows) but a graphic should be made to present the
results of the test.
The user grades could be 1,4,1,4 then lines must be drown from 1 to 4 then
from 4 to 1 then from 1 to 4
Hope this have sense
Thanks