>Hi Gary.
>
>
>>Wow - I solved the problem but I'm amazed at the solution <s>. Yesterday, I added some Word automation code and included the Word2000.h file in another include file that is utilised throughout the whole application. I dropped the automation code in favour of another solution. After finding that more or less everything was slowing down, I racked my brains for what I had done differently. I pulled the Word2000.h file out and "bingo", everything back to normal. I didn't realise what sort of impact this could have.
>>
>>Anyhow, problem solved.
>
>
>Will this have an inpact during execution time as well ?
>
>Best.

The reason it won't affect performance during execution is that each occurence of the constant is replaced by the constant at compile time.

For instance:

#DEFINE PI 3

will replace each occurrence of PI with 3 in your code (1) - the compiled code will work exactly as if you had typed 3.

The constants are used for easy maintenance of your program.


Notes:

(1) OK, I know that this is not extremely accurate... but this value was actually used in the past, sometimes even declared by law.