Create a barcode popup

I need to create barcodes in Excel. For the ID in every row of the data I want to create a barcode. The code should only get displayed when I click on the ID cell. The code should get displayed in a popup window, so I can scan it from the screen. To create the barcodes I think to use the Font Code 128, if possible.

How to create this popup?

Can one do it with user forms? Or is there something simpler? (one can not use the font code 128 in a textbox, it is not available there)

I know only some basics in VBA coding.

For now I don't need VBA code, but a simple advice what to do.

The ID Cell will be part of the range to be monitored by the Worksheet_SelectionChange event (in this example I defined this range as B2:B30)

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    If Not Intersect(Target, Range("B2:B30")) Is Nothing Then
        Set rngTarget = Target
        Call fnSplashScreen_Show
    End If
End Sub

Then in your UserForm, here named frmSS (a splashscreen-like userform), add a Label, here named lblCode128, formatting its font as Code 128 Regular (this is the font name here), and choose an adequate font size (here I tested ok for '36'). You'll have to resize the label dimensions to achieve a good one.

The suggested code to put in a module is as follows:

Option Explicit

Public rngTarget As Excel.Range
Const intSecondsToShow As Integer = 5

Sub fnSplashScreen_Show()
    Application.OnTime Now, "fnSplashScreen_Close"
    Do
        DoEvents
        Load frmSS
        frmSS.lblCode128 = rngTarget.Value
        frmSS.Show
    Loop Until True
End Sub

Sub fnSplashScreen_Close()
    Dim datWaitTime As Date
    datWaitTime = TimeSerial(Hour(Now()), Minute(Now()), Second(Now()) + intSecondsToShow)
    Application.Wait datWaitTime
    On Error Resume Next
    Unload frmSS
End Sub

These two routines deal with the Wait method delaying the unload of the Userform for 5 seconds (see Const intSecondsToShow)