flexgrid to database

I know how to save record to database from textbox but not from msflexgrid. Can you teach me how to save from msflexgrid to database also if one of the cell of the msflexgrid is empty.

I am using the code below,

rs.addnew
rs.fields("fieldname1")=text1.text
rs.fields("fieldname2")=text2.text
rs.fields("fieldname3")=text3.text
rs.update

Teach me how to apply the above way on saving with from msflexgrid.

-Mark