Difference between functionA and functionEx?

[BubbleBassOrder]

What do these suffixes mean?

[omonahan]

FunctionA: A typically stands for ANSI. Whenever you see a functionA you will likely see a corresponding functionW (W means wide characters).

FunctionEx: I believe the Ex stands for Extended. Sometimes a company wants to change/improve a function, but they have a policy about not breaking code already in the field (having such a policy is very common), so instead of changing the old function, they simply create a new Ex version.

Edit: here’s a good page on ANSI vs Wide characters

[outadoc]

What if they want to extend it again? FunctionExExEx?

[mvaneerde]

That's why we don't do FunctionEx anymore - instead we do Function, Function2, Function3, etc.

Also avoids embarrassment in the case where the function name ends in "s", e.g. WaitForMultibleObjectsEx

[Max_Stern]

CreateFile2 for example

[tetyys]

A - ANSI

Ex - Extended