Excel VBA - GotFocus/LostFocus event handler for dynamically added ActiveX Object - excel

Question

I have created a tool using Excel to gather inputs from a user and use it to do some processing of data. I have created a UI on a worksheet with a bunch of ActiveX controls (TextBox, ListBox, ComboBox).
Part of the ActiveX controls are dynamic - they are added at run time based on "metadata" that the tool admin creates on a second worksheet. Metadata contains the field name, type of ActiveX control, position of the control, ListRange to populate values, Multi-Text/Multi-Select flag, etc.
I am able to successfully add the ActiveX controls to the UI worksheet. However, now I want to add functionality for ActiveX TextBox controls to show a default text, when the control gets focus - default text gets removed, when the control loses focus - if user has entered any data it remains otherwise the default text shows up again.
Public Sub df_segment_GotFocus()
Dim wb As Workbook
Set wb = ThisWorkbook
Set form_sheet = Worksheets(Sheet1.Name)
If form_sheet.OLEObjects("df_segment") Is Nothing Then
Else
'When user begins to type, remove the help text and remove Italics
Dim seg_val As String
seg_val = form_sheet.OLEObjects("df_segment").Object.Value
If seg_val = "e.g. Desktop-Mac,Desktop-Win,Mobile-OSX" Then
form_sheet.OLEObjects("df_segment").Object.Font.Italic = False
form_sheet.OLEObjects("df_segment").Object.Value = ""
Else
form_sheet.OLEObjects("df_segment").Object.Value = seg_val
End If
End If
End Sub
Public Sub df_segment_LostFocus()
Dim wb As Workbook
Set wb = ThisWorkbook
Set form_sheet = Worksheets(Sheet1.Name)
If form_sheet.OLEObjects("df_segment") Is Nothing Then
Else
'Incase user doesn't enter any values, show the help text again
Dim seg_val As String
seg_val = form_sheet.OLEObjects("df_segment").Object.Value
If seg_val = "" Then
form_sheet.OLEObjects("df_segment").Object.Font.Italic = True
form_sheet.OLEObjects("df_segment").Object.Value = "e.g. Desktop-Mac,Desktop-Win,Mobile-OSX"
Else
form_sheet.OLEObjects("df_segment").Object.Value = seg_val
End If
End If
End Sub
In the sample code above, you can see that I am using the exact name of the control to setup the GotFocus and LostFocus event handlers. However, since my UI is metadata driven, the controls will be added/removed dynamically and I wouldn't know the name of the controls to explicitly add the event handlers.
I looked up the forums and implemented this:
a.) Implemented a Class Module
Public WithEvents df_TextBox As MSForms.TextBox
Public df_TextBox_Name As String
Private Sub df_TextBox_Change()
Dim wb As Workbook
Set wb = ThisWorkbook
Set form_sheet = Worksheets(Sheet1.Name)
Set metadata_sheet = Worksheets(Sheet2.Name)
Dim obj_name As String
obj_name = df_TextBox_Name
obj_val = form_sheet.OLEObjects(obj_name).Object.Value
MsgBox "Change in TextBox" & obj_val
End Sub
b.) Created objects for the Class where I instantiate the control objects
ElseIf d_Type = "TextBox" Then
df_obj.Object.Value = d_def_val
df_obj.Object.Font.Italic = True
If d_Multi = 1 Then
df_obj.Object.MultiLine = True
End If
'--------------------------------------------------------------
'part where we add the custom events for GotFocus and LostFocus
'--------------------------------------------------------------
ReDim Preserve TextBox_Event_Array(1 To i)
Set TextBox_Event_Array(i).df_TextBox = df_obj.Object
TextBox_Event_Array(i).df_TextBox_Name = df_obj.Name
Problem Statements
1.) When I create the class module, I don't see the GotFocus and LostFocus events available. Only Change, KeyDown/Press/Up, MouseDown/Move/Up
2.) I created a Change event handler just to test the Class Module but I do not see it getting triggered.
Any suggestions on how can I fix the problem or any alternate solutions?