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Polymorphism In Access

Posted on 2004-10-19
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Last Modified: 2012-06-21
in want to use polymorphism in VBA

the thing i try is this

dim frm as form
set frm = Forms("a type of a form")
msgbox frm.MyFunction
set frm = Forms("another form")
msgbox frm.MyFunction

MyFunction is declared in the 2 custom form i created but I don't in the standard Form class
I also tried created frm as Variant or a Object but did'nt worked
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Question by:numeriss
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12 Comments
 
LVL 10

Accepted Solution

by:
ALaRiva earned 300 total points
ID: 12351068
If the Function is to be called from another object outside of that form's scope, then you need to make sure that it's set to Public instead of Private.

i.e.
Public Function MyFunction()

instead of
Private Function MyFunction()

-Anthony
0
 

Author Comment

by:numeriss
ID: 12351088
this is the function i use in every form

Public Function MyFunction() As String
  MyFunction = "Administration"
End Function
0
 
LVL 10

Assisted Solution

by:ALaRiva
ALaRiva earned 300 total points
ID: 12351201
What's the purpose of the Function?  What do you use it for?  

If you are using the same thing in every form, then why not use one Public Function in a standard Module instead?

-Anthony

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LVL 51

Assisted Solution

by:Steve Bink
Steve Bink earned 200 total points
ID: 12351206
You also have to be sure the form is loaded (read as: opened) before referencing it.  The Forms collection only holds forms currently loaded by Access.
0
 

Author Comment

by:numeriss
ID: 12351446
I damnit I was mistyping the MyFunction and since intellisence don't show up on polymorphism I didn't noticied
0
 
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Expert Comment

by:ALaRiva
ID: 12351475
Well, that'll do it to ya!!! LOL, Glad you got it sorted out.
0
 
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Expert Comment

by:ALaRiva
ID: 12351486
What's with the B Grade?  

Not that Points or Grades matter to me, but I know that we were going through all of the standard protocols for answering a question like this, yet you gave us a B?
0
 
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Expert Comment

by:ALaRiva
ID: 12351503
Definitely not trying to cause any trouble either, I'm just curious.   Is that a standard grade when you solve the issue yourself?

-Anthony
0
 
LVL 51

Expert Comment

by:Steve Bink
ID: 12351582
The 'standard' response would have been to PAQ/Refund or Delete/Refund the question.  But if the questionner wants to award points, I doubt very much any of us will stop them.  :)

numeriss:  If you would like to have your points refunded for this question, post a request in the Community Support TA.  Good luck with the rest of your project!
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Expert Comment

by:ALaRiva
ID: 12351650
@routinet,
    Thanks for the clarification.  I wasn't sure, but I know that others get upset with B Grades so I figured I would ask what the reasoning and standard is.

-Anthony
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LVL 51

Expert Comment

by:Steve Bink
ID: 12351814
It's all good.  If you are interested in seeing the suggested guidelines for grading questions, take a look at:

http://www.experts-exchange.com/help.jsp#hi73

Remove the "#hi73" to start at the beginning of the FAQ (or scroll up!)
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Expert Comment

by:powlin
ID: 12352259
I'm grading depending on who the answer helped me if the answer was right i put excellent, if the answer was good but not the one i looked for but helped me finding the problem i give B and I think that B stand for good, that is a really positive grade, i'm happy when I get B on my school exam hehe
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