Custom Zoom Form Not Updating Data

I have some code tied to the double click event for a control that opens a
custom zoom form and displays the text as well as the label of that control.
Right now, if I add to the text in the zoom form, it doesn't actually update
the data in the table. I know I've read somewhere how to accomplish this, but
my searching isn't finding it again.
The code I'm using is below. Any help would be appreciated. Thanks

Private Sub evnt_prblm_descr_txt_DblClick(Cancel As Integer)
strZoomPar = Me.name & ";" & Me.ActiveControl.name
strTitle = Me!Label16.Caption
DoCmd.OpenForm "frm_exp_txt", , , , , , strZoomPar
Forms("frm_exp_txt").Controls("text0") = Me.ActiveControl
Forms("frm_exp_txt").Controls("text5") = strTitle
End Sub

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