How do u know if your program works on windows xp, or doesn't work on older windows ?

Hi,

I really want to know how do u know whether your program works on the lastest version of windows and not older ones. I saw some commercial programs simply have new versions that support such and such. And once i know whether the program supports it or not, how do i modify to make it compatible?

thnx

if you are coding in pure c/c++ and using the ansi functions you should be able to pretty much guarantee that it will run versions of the o/s it is compiled for.

Oh and you could always test it....

but how do u know what is to be modified if it doesn't work at all ?

thnx

If you take a look at the MSDN, you will see that every API function has a section that clarifies which Windows Versions are supported. If you happen to have only functions that support those platforms you want to develop for, it will run on all. If for example you have used two functions that will only run on XP, your program will crash when it comes to this part on 9x.

Step into the program and find where it crashes. (process line by line until the crash occurs)

or

Add messageboxes (if possible) and keep moving them further through the code until you find the crash. (On rare occasions the msg box will obscure the problem)

or

Create a text log file containing the name of each function called by the program as it is run (and the value/s sent in).

k thnx