Access 2013, when using a form to query a date range

when using a form to query a date range and various other information, is it possible to make it so that some fields can be left blank and if yes, how?
Laura SheldonAsked:
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Dale FyeOwner, Developing Solutions LLCCommented:
Generally, your query would look like:

SELECT * FROM yourTable
WHERE [StartDate] = Forms!yourFormName.txt_StartDate

But if you want that to be able to be blank and return all of the record then you would use:

SELECT * FROM yourTable
WHERE (([StartDate] = Forms!yourFormName.txt_StartDate) OR (Forms!yourFormName.txt_StartDate IS NULL))

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Laura SheldonAuthor Commented:
My query currently says: Between [Forms]![Industrial Comp Filter Form]![DateFrom] And [Forms]![Industrial Comp Filter Form]![DateTo].

Can you restate your solution with that in mind? I'm not as familiar with visual basic as I'd like.
Jeffrey CoachmanMIS LiasonCommented:
is it possible to make it so that some fields can be left blank
...and what would a "Blank" represent?
Laura SheldonAuthor Commented:
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