Elegant simplicity of MASM, a clean clutter free technique for passing multiple arguments in a structure. This builds at a disk busting 1.5k. :P
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include \masm32\include64\masm64rt.inc
mbargs STRUCT ; custom structure (write your own)
hndl dq ?
mesg dq ?
titl dq ?
styl dq ?
mbargs ends
.code
; ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
entry_point proc
LOCAL mba :mbargs ; allocate local structure
mov mba.styl, MB_OK ; load the MB style
; -------------------------------------------
; assign the strings to the structure members
; -------------------------------------------
sas mba.titl, "MessageBox Title"
sas mba.mesg, "Text Message in a MessageBox"
mov mba.hndl, 0 ; handle in this instance is 0
rcall MbProc,ptr$(mba) ; call proc with structure address
.exit
entry_point endp
; ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
MbProc proc
USING r15 ; preserve r15
SaveRegs
mov r15, rcx ; load structure address into r15
; ------------------------------------------------------------
; call the MessageBox using the structure members as arguments
; ------------------------------------------------------------
rcall MessageBox,(mbargs PTR [r15]).hndl, \
(mbargs PTR [r15]).mesg, \
(mbargs PTR [r15]).titl, \
(mbargs PTR [r15]).styl
RestoreRegs
ret
MbProc endp
; ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
end
comment #
.text:0000000140001000 C8800000 enter 0x80, 0x0
.text:0000000140001004 4881EC80000000 sub rsp, 0x80
.text:000000014000100b 48C7459800000000 mov qword ptr [rbp-0x68], 0x0
.text:0000000140001013 488B0557100000 mov rax, qword ptr [0x140002071]
.text:000000014000101a 48894590 mov qword ptr [rbp-0x70], rax
.text:000000014000101e 488B0578100000 mov rax, qword ptr [0x14000209d]
.text:0000000140001025 48894588 mov qword ptr [rbp-0x78], rax
.text:0000000140001029 48C7458000000000 mov qword ptr [rbp-0x80], 0x0
.text:0000000140001031 488D4580 lea rax, [rbp-0x80]
.text:0000000140001035 488BC8 mov rcx, rax
.text:0000000140001038 E80D000000 call sub_14000104a
.text:0000000140001038
.text:000000014000103d 48C7C100000000 mov rcx, 0x0
.text:0000000140001044 FF15BA100000 call qword ptr [ExitProcess]
.text:0000000140001044
; --------------------------------------------------------------------------
; sub_14000104a
; --------------------------------------------------------------------------
sub_14000104a proc
.text:000000014000104a C8800000 enter 0x80, 0x0
.text:000000014000104e 4883EC70 sub rsp, 0x70
.text:0000000140001052 4C897D90 mov qword ptr [rbp-0x70], r15
.text:0000000140001056 4C8BF9 mov r15, rcx
.text:0000000140001059 4D8B4F18 mov r9, qword ptr [r15+0x18]
.text:000000014000105d 4D8B4710 mov r8, qword ptr [r15+0x10]
.text:0000000140001061 498B5708 mov rdx, qword ptr [r15+0x8]
.text:0000000140001065 498B0F mov rcx, qword ptr [r15]
.text:0000000140001068 FF15A6100000 call qword ptr [MessageBoxA]
.text:0000000140001068
.text:000000014000106e 4C8B7D90 mov r15, qword ptr [rbp-0x70]
.text:0000000140001072 C9 leave
.text:0000000140001073 C3 ret
sub_14000104a endp
#
