hi,all boys and girls.
this is a loop of the messagebox.it will show next to 5 messageboxes constandly. In the source code, note. while .endw,. if .endif,{},{= and other advanced grammar application structure points.
; -------------------------------------------------------------------------
;include \masm32\include64\invoke.inc
include \masm32\include64\masm64rt.inc
; -------------------------------------------------------------------------
.data
szDlgTitle db "Minimum MASM--最小的对话框", 0
szMsg db " --- 64 Bit Assembler Pure and Simple --- ", 0
.code
entry_point proc
;jmp @F
;szDlgTitle db "Minimum MASM--最小的对话框", 0
;szMsg db " --- 64 Bit Assembler Pure and Simple --- ", 0
;@@:
LOCAL .rcx:qword
;=================================================================
;= ;xor rcx, rcx
;= ;lea rdx, szMsg
;= ;lea r8, szDlgTitle
;= ;mov r9, MB_OK
;= ;call MessageBox
;= ;xor rcx, rcx
;= call ExitProcess
;==================================================================
; --------------------------------------------------------
; The following are the same function calls using MASM
; "invoke" syntaxa and "rcall" syntaxa. It is clearer code, it is not type checked
; against a function prototype and it is not less error prone. :P
; --------------------------------------------------------
; LOCAL .rcx:qword
mov bx,1
;请使用rax,rbx,al,bl,ax,bx,r10,r11,r12,r13,r14,r15等寄存器做条件判断和循环计数器，我们会看到不同的程序运行结果，这就深刻认识了CPU的工作机制和WIN64的调用约定。除了rbx,bx,bl,r12,r13,r14,r15做计数器外，
;其他的寄存器做计数器，程序都陷入死循环。对话框消息无限制循环下去。
.while bx {= 10
.if bx } 5
.exit
.endif
rcall MessageBox,0,"=====MASM64 Pure and Simple!!!======="," UI Template",MB_OK
xor rcx, rcx
lea rdx, szMsg
lea r8, szDlgTitle
mov r9, MB_OK
call MessageBox
add bx,1
.endw
.exit
entry_point endp
end