MS Access - Close pop-up form when clicking main form

I have two forms in a MS Access 2007 database:

frmDataEntry, frmAdjustmentsPopup

frmDataEntry has an event that causes frmAdjustmentsPopup to open.

Rather than have the user click frmAdjustmentsPopup's close button, I would like frmAdjustmentsPopup to close when the user clicks anywhere within frmDataEntry.

I realize this may seem trivial, but this would greatly improve data entry speed.

frmDataEntry is set as continuous forms.
frmAdjustmentsPopup opens with Popup = Yes, Modal = No.

It has to remain Popup = Yes as frmDataEntry runs maximized and has to stay that way, and frmAdjustmentsPopup should not be maximized when opened.  

frmAdjustmentsPopup's On Lost Focus and On Deactivate events do not capture the event of clicking on frmDataEntry.

frmDataEntry's Form_Activate, Form_GotFocus, Form_MouseDown events do not capture the event of leaving the popup form and going back to frmDataEntry.

Edit:
One thing I just read is this:
The Activate event doesn't occur when a form receives focus back from a dialog box, popup, or another form.

So, I need a workaround for this, as I have to run this as a popup.