0:000> u USER32!GetMessageW
USER32!GetMessageW:
00007ff8`026f2660 fff3 push rbx
00007ff8`026f2662 4883ec20 sub rsp,20h
00007ff8`026f2666 418bc0 mov eax,r8d
00007ff8`026f2669 458bd1 mov r10d,r9d
00007ff8`026f266c 488bd9 mov rbx,rcx
00007ff8`026f266f 410bc1 or eax,r9d
00007ff8`026f2672 a90000feff test eax,0FFFE0000h
00007ff8`026f2677 0f8503700500 jne USER32!GetMessageW+0x57020 (00007ff8`02749680)