How can I possibly include a .inc from MASM32 in VS Code?

Question

My .asm code goes:

.386
.model flat, stdcall
option casemap: none
include windows.inc
include kernel32.inc
include user32.inc
includelib kernel32.lib
includelib user32.lib
.data
szCaption db "Hello", 0
szText db "Hello World!", 0
.code
main PROC
INVOKE MessageBox, NULL, addr szText, addr szCaption, MB_OK
INVOKE ExitProcess, 0
main ENDP
END main

But the following error occurred:

Copyright (C) Microsoft Corp 1993.  All rights reserved.
     Invoking: ML.EXE /I. /Zm /c /Ta D:\TEST.ASM 
     Assembling: D:\TEST.ASM
    D:\TEST.ASM(4): fatal error A1000: cannot open file : windows.inc

I have installed extensions: MASM/TASM, masm-code, MASM runner and code runner according to different posts I have found. Plus, I have already installed masm32 at C:\masm32 under instructions. I have added my environment variables: Path:(\masm32, \masm32\bin)

But seems that my VS Code still fails to reach masm32. What else should I do to fix? My OS is Win10.