Update database problem

I've made a form that adds a new client to my database. There is a field Labled IDNumber that is not edited on the form. I want the number to be the last IDNumber + 1. this number will be in a relationship in other tables. but i need to know how to pull the number and add 1 to it before the update statement.

VB Code:

Dim Table1 As New dsTable1.Table1Row() = dsTable1.Table1.Select()
 
Dim NewIDNumber As Integer = Table1(0).IDNumber + 1

Replace "Table1(0)" with "Table1(Desired Record Index)"

Quote:

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I've made a form that adds a new client to my database. There is a field Labled IDNumber that is not edited on the form. I want the number to be the last IDNumber + 1. this number will be in a relationship in other tables. but i need to know how to pull the number and add 1 to it before the update statement.

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Are you using an Access database? If so just set you column to autonumber.