Just a friendly reminder. You need to ALWAYS use Option Explicit. Look at the top of any module of code, whether under forms or modules. The first two lines should be …
Option Compare Database
By default, Access only puts the 1st one. You have two ways of getting the 2nd line in there.
- type it in manually, or,
- under Tools, Options in the VBA editor, turn on “Require Variable Declaration”
What does it do? Forces the “compiler” to make sure that EVERY variable has been declared. Basically, helps stop typos from causing “bugs”.
Just trust me on this one, and do it!
I may have given this one before, but it is SO useful. I personally had to use it last week.
The computer you are at does not have the Linked Tables utility working and you need to know where the user’s data is stored. Try this command in the VBA Editor’s Immediate Window (Ctrl-G)
Where Holders is an example table name (change that to one from your database).
(NOTE: you may have to have DAO references on. see this page if you do not know what that means)
Today I was working on some code that I have been asked to enhance. I came across the following bit of code.
if a = b then
do something that does NOT affect a or b
do something else that does NOT affect a or b
if a = b then
do a lot of stuff
Why are there 2 identical if statements, with no code inbetween that affects the comparison test?
This reminds me of the article I wrote, called Working with Other Developers. Please spend at least a little bit of time on the “look-and-feel” of your VBA code. It makes it much easier for someone else (maybe even you) to read and understand your logic.
p.s. another problem with the system I am working on is that it has a lot of orphaned code. That is, code that is no longer attached to an object, and will never run. Some of this code causes the Access compiler to choke and sputter, and I depend on the compiler to help me find errors. Hence, I had to spend time getting rid of the orphaned stuff.
I have done a major rewrite of this article, first published many moons ago. The new version has 4 screen shots (about 60 K in total), to help you visualize what I am suggesting. I think I explain myself better as well.
If you have dozens of reports that need various criteria fields, then between this new version and the original Part 1 of this series, you should have a workable answer.
Read the article by clicking here.
As always, write me with further ideas or questions about this article.
I have chosen to start doing my news updates via a WordPress blog. I will also use this to post small tips that I feel are too small for a full article.
Richard “Manxman” Killey