That's because PASCAL was used for 16-bit Windows. They only define it as stdcall in 32-bit and 64-bit compilers for source compatibility reasons.
The 16-bit Windows SDK does not define PASCAL as stdcall.
PASCAL pushes arguments left to right. stdcall pushes arguments right to left.
As I remember, and if I'm wrong, I'll correct it, the different on 32-bit was that stdcall and pascal change the order of how arguments are injected.