Declaration using Public

Posted on 1998-08-02
Medium Priority
Last Modified: 2010-05-03
May i know what are the differences between the
Public db as Database &
Dim db as Database?

When I am using the Public db as Database, the compilation error of UserDefined type not specified is given..

Please give me advice when should i use the Public to declare variable and how?

Waiting for ur reply, thanks

Question by:SRQ

Accepted Solution

clifABB earned 300 total points
ID: 1467506
With the error you have received, it looks like you haven't added a reference to the Data Access Object (DAO).
In VB's main screen, select menu option Project/References.  From the dialog box scroll down till you get to the DAO objects.  Unless you have a reason to select a lower version number, select the DAO with the highest object number.

It seems MS is a pain in the behind on this.  Most apps developed with VB will use the DAO and yet the reference to it isn't defaulted.

As far as advice on using Public as opposed to Private.  You should try your hardest to avoid using public variables.  Public variables are harder to debug.

There are times when you do want a Public variable (a database object is a good example) usually this will be a variable which will not change in the life of the app.  Most variables you definitely do not want to be public (a loop counter is a good example).  Many a time I have wanted to kick a programmer who made a loop variable public and then the app ended up going through two loops at the same time in different parts of the app.

Author Comment

ID: 1467507
u have answered my question well, thanks

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