obviously, it hasn't been a problem
the reason is - they are not really applicable in ASM programming
noone has used them, so it hasn't been an issue
the "LP" constants are types that could be TYPEDEF'ed as DWORD's or LPVOID's
i would probably use LPVOID anyplace they are needed
in ANSI or in UNICODE, a pointer is a pointer

the WC_PAGESCROLLER constant is a system-defined window class
the constant is of little use in ASM - we need a null-terminated string
szPageScrollClass db 'SysPager',0
we could delete or comment the lines out, with little effect