Have been trying to hide away my interface declarations again.

Why does something like this: (with the equ in an include file)



give an Error: Illegal instruction, but the resulting error line works perfectly if substituted into the code?



Is there a correct to hide away the declaration of data types like this, without using struct?

Hard code the struct (think about obfuscation)
But consider speed and size too

I don't know what interface is but have you tried using fix instead of equ?

Hey! That works!

So the preprocessor stage is already over when the equ is substituted in, making the macro unintelligible for the compiler?

I wish I knew the order of operations and I could be wrong on this but I think that equ evaluates too early on IDIRECTDRAWSURFACE7, whereas the fix evaluates on primary.