I know how to do it.

AddTwo.asm

+.386
+.model flat,stdcall
+.stack 4096
+ExitProcess proto,dwExitCode:dword
+option casemap :none   ;去掉大小写敏感
+
+include windows.inc
+include user32.inc
+includelib user32.lib
+include kernel32.inc
+includelib kernel32.lib
+
+.data
+
+szCaption db 'Win32 Example',0
+szText db 'Win32 Assembly, Simple and powerful!',0
+
+.code
+main proc
+	invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK
+	invoke ExitProcess,0
+main endp
+end main
\ No newline at end of file