Modules & VBA :: Assign Values To A Table Through Code?

I have a table (tblPrinterSelection) with three fields: Autonumber, DocType, PrinterSel

There are three types of values for "DocType"; "Document", "LargeLabel", "SmallLabel"

I want to assign a "PrinterSel" to each type of "Doctype", which basically means that the user selects the type of document and then the printer in a form that has the code below and then I need the code to automatically update the table.

Code:
Dim PrintSel As String
Dim DocType As String
'Assign a value to the printer selected variable
PrintSel = Me.lblPrinterSelected.Caption
If IsNull(Me.frmDocType) Then
MsgBox "No document type selected."

[code]....

What i am looking for is code that would pick the value for "DocType" and "PrintSel" assigned here and add them to the table so that I can use that info later.

I am only looking to have three rows in that table so if the "DocType" does not exist then a new row is created but if it does, only the value of "PrintSel" is updated.

I should end up with something like this:

1 Document Epson
2 LargeLabel HP
3 SmallLabel Canon

How can I do this?