How to use VBA to add new record in MS Access?

In order to submit a record using VBA, create an On Click event for the button, and in that Sub run the following command:

Private Sub submitButton_Click()

    'All the code to validate user input. Prompt user to make sure they want to submit form, etc.

    DoCmd.RunSQL "INSERT INTO tblCustomers (CustomerID, CustomerName, CustomerAddressLine1, City, Zip) values (txtCustomerID.Value, txtCustomerName.Value, txtCustomerAddressLine1.Value, txtCity.Value, txtZip.Value)"

End Sub

In this Sub, you can add all the code you want to validate the values that the user entered and choose whether or not you want to submit the record. There's a lot of control using VBA to submit your forms, so you do not need a BeforeUpdate event.

Also, do NOT use bound forms with this method. I don't know what the repercussions are but I wouldn't try it. Access is great for starting off, but as you want to do more complex things, it is easier to just use VBA.

It seems strange that you would create a before update event for your form to create a prompt before closing. Perhaps you should try the on close event instead. If you want to use vba to add a new record from the form you can simplify your statement. I came across a similar situation when designing my own form for my Access DB. This code is tested and working:

Dim sVIN As String
Dim sMake As String
Dim sModel As String
Dim sColor As String
Dim sType As String
Dim intYear As Integer

sVIN = Me.txtVIN.Value
sMake = Me.txtMake.Value
sModel = Me.txtModel.Value
sColor = Me.txtColor.Value
sType = Me.comboType.SelText
intYear = Me.txtVehicleYear.Value

DoCmd.RunSQL "INSERT INTO Vehicles (VIN, Make, Model, VehicleYear, Color, Type) VALUES ('" & sVIN & "', '" & sMake & "', '" & sModel & "', " & intYear & ", '" & sColor & "', '" & sType & "')"

If you are just using one DB in your project and you're connecting on start up you can sometimes run simple DoCmd.RunSQL statements like this. You can take the syntax here and adapt it to your own project. I myself got the basic syntax from W3 schools. Good site for learning to write SQL queries. It should also be noted that validation testing is not included here. You should make sure it is included in the form validation rules or in vba code. One more thing... in your SQL it looks like you are attempting to assign a value to the ID column from a text box entry; if ID is an auto number column, don't do this. ID columns are usually assigned a number automatically, so you don't need to (or want to) specify an insert value for that.