To do this by hovering over Controls is going to require code in an event for each Control, even if it's just Calling a function common to all of the Controls, such as one displaying the Control Name. But to trigger your code each time a character is entered into any Textbox/Combobox, for instance, in Form Design View, with the Form itself selected, go to Properties - Events and set the Key Preview Property to Yes. Then use your code in the Form_KeyDown event:
Code:
Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
Dim desc As String
desc = "Description:" & vbCrLf & cbCrLf & Me.ActiveControl.Name & vbCrLf & vbCrLf & Forms(Me.Form.Name).Controls(Me.ActiveControl.Name).StatusBarText
Me.txtInfo.Caption = desc
End Sub
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