Form's On Key Down doesn't seem to fire

[GraeagleBill]

I have a form with an "On Key Down" event that does not fire when I press the Ctrl key. I have another form in the same app that responds to the Key Down event without issue. What might cause the strange behavior?

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
'========================================================================================
' User wants to see the HELP file for selected option
'========================================================================================
MsgBox KeyCode


If KeyCode = vbKeyControl Then bolHELP = True


End Sub

There is a class module associated with the form, but I don't see how that would affect a Key Down event.

[davegri]

At the very bottom of the form's property sheet event tab:

[GraeagleBill]

Thank you. A very old form but a new event added. No idea why the key preview was set to NO.
Thanks again,
Bill