Using Filtering from a Navigation form in Access 2013

I have a Navigation Form in Access which has a dropdown, from which the user will select a Site.

Once this is chosen, a subform within the Navigation Form needs to use the value from the dropdown as a filter. But I don;t know how to do this in VBA.

The example Ihave attached has a main form within the Navigation Form. Normally thiswill hold another subform.
Rick DangerAsked:
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
It looks like your form has a sub-subform. Do you want to filter that sub-subform? If so, you'd use syntax like this:

Me.Controls("main").Form.Controls("stages").Form.Filter = "site_id=" & Me.cmb_site
Me.Controls("main").Form.Controls("stages").Form.FilterOn = True

Note also I changed the Filter to use "site_id" instead of "fk_siteID". Your filter must refer to a field on the sub form (or the sub-subform, in your case).

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Rick DangerAuthor Commented:
Thanks -  I'd changed it a lot just so I could upload it. That wasn;t the way it was originally.

Great solution, thanks!
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