Today,We will see "How to Add DataGridView Column Value in VB.NET?"
Private Function ADDCoulmnValue(ColIdx As Integer, dgv As DataGridView) As Double
Dim d As Double = 0
For idx As Integer = 0 To dgv.Rows.Count - 1
tot += Convert.ToDouble(dgv.Rows(idx).Cells(ColIdx).Value)
Next
Return tot
End Function