Windows programming globals help

[David Andersson <97davan@ostrabo.uddevalla.se>]

Hello GameProgrammers!

Access Violation...
I'm working with a program (it's not a game, but the knowledge derived
from your superior experience will help me in my next project, which is
a game) in school. It's supposed to draw fractals, like the Julia Set.
After hard struggling I've been able to get a fractal up, only the
visual thing is left. When I generate the fractal, I don't want the
user  staring right into an empty screen so I created a TProgressBar
component in the main window.
(BTW, I'm using Borland C++ Builder v.3)

So, when generating the fractal, I want the progress to be shown on the
component. The thing is: I can't access the component normally from
another unit!
The main form, 'FraktalForm', owns the progressbar 'Progress' so when I
access Progress i write:
  FraktalForm->Progress->Position++;
When I run the program I get an "Access Violation" Error. I have tried
to change the scope of the component and its form but, although the
compiler accepts without question, it all the same end up crashing.

I also get several "Linker Warning: global _algoritm is declared both in
ModuleX and ModuleY". I find the compilers help insufficent.
Also I've made some of the files #include each other, but I added the
lines  #ifndef MACRO  #define MACRO  ...  #endif, to make sure they had
access to each other.

Finally, I'm totally clueless about these problems. And, the program
*must* be finished before Monday next week...
Thankyou for any help in the matter!



David
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