Below is a question that I will answer myself, however it caused a GREAT deal of frustration for me and I had a lot of trouble searching for it on the web, so I am posting here in hopes of saving some time & effort for others, and maybe for myself if I forget this in the future:

For VBA (in my case, MS Excel), the **`Public` declaration is supposed to make the variable (or function) globally accessible by other functions or subroutines in that module, as well as in any other module.

Turns out this is not true, in the case of `Forms`**, and I suspect also in `Sheets`, but I haven't verified the latter.

In short, the **following will NOT create a public, accessible variable** when created in a `Form`, and will therefore crash, saying that the bYesNo and dRate variables are undefined in mModule1:

```
(inside fMyForm)
Public bYesNo As Boolean`
Public dRate As Double

Private Sub SetVals()
    bYesNo = Me.cbShouldIHaveADrink.value
    dRate = CDec(Me.tbHowManyPerHour.value)
End Sub
(Presume the textbox & checkbox are defined in the form)

(inside mModule1)
Private Sub PrintVals()
    Debug.Print CStr(bYesNo)
    Debug.Print CStr(dRate)
End Sub

```

However, if you make the slight alteration below, it all will work fine:

```
(inside fMyForm)

Private Sub SetVals()
    bYesNo = Me.cbShouldIHaveADrink.value
    dRate = CDec(Me.tbHowManyPerHour.value)
End Sub
(Presume the textbox & checkbox are defined in the form)

(inside mModule1)
Public bYesNo As Boolean`
Public dRate As Double
Private Sub PrintVals()
    Debug.Print CStr(bYesNo)
    Debug.Print CStr(dRate)
End Sub

```

`mModule1` will work perfectly fine and, assuming that the fMyForm is always called first, then by the time the `PrintVals` routine is run, the values from the textbox and checkbox in the form will properly be captured.

I honestly cannot possibly fathom what MS was thinking with this change, but the lack of consistency is a huge suck on efficiency, learning idiosyncracies like these, which are so poorly documented that a Google search in 2013 for something that has likely been around for a decade or more is so challenging to search.