the difference:

win64 constant that check if the OS is 64 bit
win32 constant that check if the OS is 32 bit
VBA7 check if your Office is 2010 or Later (regardless if 32 or 64)

64-bit Visual Basic for Applications overview | Microsoft Docs

also not all Long is needed to be converted to Longptr.
you only use them for pointers and window handle
as described in the link.