filter subform using cbo box

[deb]

Access 2016

I have a form f_WorkingHours with a subform f_WorkingHoursSub.

The subform has a combobox called cboDate in the form header.

I want to filter the [Report Date] in the subform using cboDate.

Also need the option to select all dates or unfilter to show all dates if user wants to see all dates again.

I tried this....
Private Sub cboDate_AfterUpdate()

If Not IsNull(cboDate.Value) Then
f_WorkingHoursSub.Form.Filter = " [Report Date] = " cboDate
f_WorkingHoursSub.Form.FilterOn = True

Else
f_WorkingHoursSub.Form.FilterOn = False
End If
End Sub

 

[Micron]

f_WorkingHoursSub.Form

Bold has to be the name of the subform control. Possibly they are the same, but not guaranteed that they are.
Also, if combo does not return a value of Date data type, the cboDate reference has to be delimited as a Date - maybe
"[Report Date] = #" & cboDate & "#"
Regardless, an expression has to be concatenated with a variable.

That's all based on your post, which is a bit sketchy because you didn't specify what the actual issue is - error? no result? wrong result? or on what line caused it if there was one.