I've found on the net this article that may help those who are giving the first steps on Visual Basic. Hope it helps...
(It is not my intention underestimate the good things on VB...so, sorry VB lovers)
"Stob - January 2000
Thirteen ways to loathe VB
Verity Stob has recently been press-ganged into a Visual Basic project. For
the benefit of other programmers who may be brought down in this way, she
has prepared an executive summary of her experience.
1. Procedure and function call. This area of Basic has come on in leaps and
bounds. Whereas in the bad old days you had to use GOSUB, these days you
have subs ('subs' is the preferred baby-speak for what grown-ups call
procedures or void functions) and functions. You write:
Subname Param1, Param2
to call sub Subname and:
Result = FuncName(Param1, Param2)
to call function FuncName. Notice the useful difference in syntax, with and
without parentheses, which serves more purposes than I can describe. It is
of course a syntax error to write:
but the good news is you can write:
to call a function and ignore its return. However, if Param1 or Param2 are
reference parameters - and they will be unless you have specifically
demanded value parameters - they will be treated in this specific case as
value parameters, and any assignment to them discarded on exit from
Obviously the syntax:
Call FuncName(Param1, Param2)
fixes this, and causes Param1 and Param2 to be treated as reference
2. Variable declaration. This is achieved using the intuitive keyword Dim.
To declare an integer I write
Dim I As Integer
To declare a whole load of integers write:
Dim I, J, K, L As Integer
Actually (haha got you!) this doesn't work. This declares I, J, and K as
variants and only L as an Integer. This almost never matters, except quite
3. Calling functions and accessing arrays. In most languages you can
distinguish between a call to function F with parameter 3 and a reference to
array F index 3 because one is written F(3) and the other F. In Visual
Basic they are both written F(3). Yes.
4. Another thing about arrays. The index of the first element is 0, unless
it is set to 1 by a directive.
5. But there are also collections, modern object-oriented versions of
arrays. And the first element of these is usually 1, unless it happens to be
0. Sometimes it is 0 and sometimes it is 1, depending on where you found it.
Do you feel lucky, punk? Well, do ya?
6. Did I mention 'object-oriented' back there? Hahahahahahahahahahahahaha.
7. Initialisation. This area of Basic has come on in leaps and bounds.
Whereas in the bad old days you had to use a completely barbaric mechanism
based on the keywords DATA and READ, this has now been swept away. The
fragment below illustrates the modern way to initialise an array in code.
Dim A(20) As Double
A(0) = 4.5 ' May work, may not - who can tell?
A(1) = 4.71
A(2) = 4.82
A(3) = 4.92
You get the idea.
8. Arrays of constants. No such thing. Anyway, what would you do with 'em if
you had 'em?
9. The type Integer declares a 16-bit integer. That's right, sixteen bits.
Yes I am using the latest version. Unbelievable, isn't it? Let's have a big
warm EXE welcome back to code that dies suddenly around the 33 KB mark.
10. Assignment. This area of BASIC has come on in leaps and bounds. Whereas
in the bad old days you used the = operator for assignment, preceding it
with LET if you were a fusspot of the first order, these days you use the =
operator for assignment, preceding it with Let if you are a fusspot of the
first order. Or Set if it's an object. Which is compulsory not optional.
11. Logic. This particular language is supposed to be easy and intuitive, so
here's a test for you. Suppose that Check1 is a checkbox on a form, and you
execute the code:
Dim b As Boolean, c As Boolean
b = Check1.Value
c = Not Check1.Value
Then b as expected will contain True if the checkbox is checked and False if
the checkbox is unchecked. What do you think c will contain? (Clue: always
True. No, really.)
12. The four magic constants of the apocalypse: Nothing, Null, Empty, and
12.5 The stupid editor, which by default will put up a whining dialog if you
try to leave a line which it recognises as syntactically incorrect. Like
when you leave an incomplete line temporarily to go and copy a long
identifier into the clipboard, for example.
12.7 The stupid compiler, which by default does a 'compile' so superficial
that you can get runtime errors caused by an If missing its End If.
12.8 Procedures, sorry 'Subs', can be declared Public, Private, or Static.
Two points to anybody who correctly guesses what Static does. Three points
to anybody who can suggest a sane use for it.
13. Bill is making even more money out of this. And I am powerless to stop
him. In fact, I am helping him."