using IsLoaded in a query

i have a form that can be opened from either of 2 different forms.it is called credit. in the query that is the control source for credit i tried to put this in the criteria of the AccountNumber field.

iif(IsLoaded("MyfirstForm"),forms![MyFirstForm]![AccountNumber],forms![MySecondForm]![AccountNumber])

this in theory, as i see it, should check to see if MyFirstForm is open and if it is then to pass the AccountNumber to the credit form and pull up the appropriate record. otherwise it should pass the AccountNumber from MySecondForm (if MyFirstForm is not opened the only other form that can call the credit form is MySecondForm).

but, when i run it even if MyFirstForm is not open, but MySecondForm is, it still asks me for a value to the field forms![MyFirstForm]![AccountNumber].

i hope this all makes sense.

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BangerterAsked:
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BangerterAuthor Commented:
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BangerterAuthor Commented:
Edited text of question
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cekmanCommented:
I do this exact same thing in one of my applications. You can't use the iif statement. You must create a FUNCTION in a separate module then call the functionin the criteria statement of your query. For example - create a function called RETURNVAL() that checks which form is open and returns the value you need. Then, in the criteria statement of the query just put  RETURNVAL()

Hope this helps!
Carla
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ramromconsultant Commented:
Realize that iif evaluates ALL of its arguments, regardless of value of the first.
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ramromconsultant Commented:
Realize that iif evaluates ALL of its arguments, regardless of value of the first.
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BangerterAuthor Commented:
Trygve i never did see your solution because of some kind of error so i cant evaluate it.

Cekman if you will lock this question i will give you the points

Thanks
Brent
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cekmanCommented:
Thanks! CEkman
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