Working on a ListView header click routine that wasn't being triggered, tracked it down to the NMHDR structure.
I was using NMHDR structure (richedit.h) (https://learn.microsoft.com/en-us/windows/win32/api/richedit/ns-richedit-nmhdr), the first hit on Google
typedef struct _nmhdr {
HWND hwndFrom;
UINT idFrom;
UINT code;
} NMHDR;
After a couple of hours searching, I was steered to the correct structure definition at NMHDR structure (winuser.h) (https://learn.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-nmhdr)
typedef struct tagNMHDR {
HWND hwndFrom;
UINT_PTR idFrom;
UINT code;
} NMHDR;
Thanks, Microsoft :rolleyes:
MASM32 uses the old definition (UINT) but MASM64 uses the new one (UINT_PTR).
Too bad I don't use the MASM64 SDK :tongue: