need assistance writing to datagridview cells

[rolltide0]

I am building a report app that will dump the results to the screen and to a file. Since it is a lot of data, I decided to go with the dataGridView because to me it just made sense (I do not have a lot of vb experience). The problem is I do not know how to manually write to this thing. If someone could give me an example of a few things with it, I can figure out the rest fairly easy. Apparently this is not done often as I cannot find a single reference in all my books on how to do this. Here is some information:

1) the name of the datagrid is resultsGrid
2) The grid has about 50 colums, all named
3) Some of the column names are: orderNum, proNum, poSo
4) I'd like to know if i could reference columns by name or by row/col location
5) I can put info in a column at a time or a row at a time if that is possible
6) I need to know how to make a new row once the information is in there.

Thanks in advance

EDIT: I forgot to mention, I am using vb 2005