test.asm

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.386p
.model flat,stdcall
option casemap:none
winmain proto :dword,:dword,:dword,:dword
include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
include \masm32\include\gdi32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\gdi32.lib
.data
param1 dd 9
param2 dd 20
param3 dd 4
param4 dd 5
caption     db "test",0
buffer db "Result is ",?,?,13,10,"Hello ,You Success!",0
char db "%d",0
.data?
.const
.code
  start:
  invoke winmain,param1,param2,param3,param4
  invoke ExitProcess,0

winmain proc par1:dword,par2:dword,par3:dword,par4:dword
   mov ecx, par1
  .repeat
     dec par2
  .untilcxz
  .if par2>0
     invoke  wsprintf ,addr buffer+10,addr char,par3
  .elseif
     invoke  wsprintf ,addr buffer+10,addr char,par4
  .endif
  mov byte ptr buffer+11,20h
  invoke    MessageBox,NULL,addr buffer,addr caption,MB_OK
  ret
winmain endp
  end start