The source of your confusion is that there are two versions of macro WinAPI: 32bit in the library winapi.htm, and 64bit in winabi.htm https://euroassembler.eu/maclib/winabi.htm#WinAPI , and you were looking at the former one. Unfortunately only one of them is listed on Index page (I should do somet...

2) 3) I don't have to bother with calee-save registers if I'm not using them in my function, do I? Are there some API functions which use XMM for passing parameters? I know this possibility is specified in ABI but I don't see any useful application of such ABI call, which I could use for debugging....

1) Stack alignment in 64bit WinAPI is provided by the pair of instructions PUSH RSP and ADDQ [RSP],8 , which is or is not skipped depending on runtime stack alignment tested with instruction TEST SPL,1000b . I hope this mechanism is better explained in the example at https://euroassembler.eu/maclib...

Many libraries shipped with €ASM contain macros for 64bit mode, as declared in the column Width at https://euroassembler.eu/maclib/ Well let's talk about that, but first ... 1) Stack alignment in 64bit WinAPI is provided by the pair of instructions PUSH RSP and ADDQ [RSP],8 , which is or is not ski...

Got it.

The analogy will not be obvious to American English speakers that I know of. Maybe you can wait and see if anyone else makes a comment about it.

I noticed that in all of the macros, that they only support Win32 and not Win64. Is this because €ASM is still new and that is a feature not yet available? A few other observations: 1) I don't see where the stack is aligned on 16-byte boundaries for a Procedure as it should be per the Win64 ABI 2) N...

Under the description for the WINAPI macro, it says, "Amphibious functions, which have both ANSII and WIDE variant, may be specified with or without explicite suffix A or W." It's supposed to say ambiguous, not amphibious. Under the description for %SETB, it says, "%SETB is similar to...

I noticed in the example for %SET2, that the directive %DataExp was used, but I can't find anything on the website that explains what it is or does. It looks like a function/macro for concatenating parameters inside a MACRO. Could you please explain %DataExp? Ditto for %Suffix and %# in the WinAPI m...