datagridview help with basics

[quantzie]

Hi I am just starting to learn the advanced parts of VB....this datagridview is new to me and I have no idea how to use it properly. Right now when I need to input data into the dgv, I have to do this:

If vdgv = 0 Then
dt.Columns.Add("Item")
dt.Columns.Add(" ")
dt.Columns.Add("Particulars")
dt.Columns.Add("QTY")
vdgv = 1
End If

The counter stops the program from adding the headers twice. I then input the data with this

dgv1.DataSource = dt
dt.Rows.Add(New Object() {"", txtquan.Text, txtfin.Text, ""})
dgv1.CurrentCell = dgv1.Rows(0).Cells(0)

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Is there a proper way for me to add the columns before hand and not have it in the coding???I can add the columns manually but I have no idea how to input the data in....Thanks for your help!!