Please help with datagridview

[Mic13]

Hi,

I'm totally beginer (noob) in programmers world, I'm trying to prepare my first program (database). I'm creating it just acording to my knownledge so it's a little bit cr..

in form1 I've 3 comboboxes (CB) 3datagridviews(DGV) and some textboxes (TB)

all DGV are connected to a diffrent database files..
CB1 list values from DGV1; CB2 from DGV2 etc

'CB1.DisplayMember = "Column3"
CB1.DataSource = dBaseDT

when I'm choosing the value from CB1 then values in CB2 and CB3 are changing to the same value. then in all DGV is sellected row with value choosen in CB1 (if present).
'
CB2.Text = CB1.Text



Now I would like to copy the text from specific colum of choosen row in DGV1 to TB1... but only part of the text..
I'm using this

'Dim mm As String
'TB1.DataBindings.Clear()
'TextBox1.DataBindings.Add("TEXT", dBaseDT, "Column10")
'mm = TB1.Text
'TB1.DataBindings.Clear()
'TB1.Text = Microsoft.VisualBasic.Right(mm, 3)

unfortunately when I make simple databinding without cutting the text it shows me value from actual sellected row but wen I'm using Microsoft.VisualBasic.Right it shows me the cutted part from previous choose.

Please teach me how to fix it??

Thanks
Mic