;64 bits program
macro _push reg {
  if ~defined __tmpReg_#reg
     jmp @f
     __tmpReg_#reg dq 0
     @@:
  end if
mov [__tmpReg_#reg],reg }

;in code
  _push rax

    

format PE64 GUI 5.0 on 'nul'
entry Start
 include 'c:\fasmw17316\include\win64ax.inc'

 macro _push reg {
  if ~defined __tmpReg_#reg
     jmp @f
     __tmpReg_#reg dq 0
     @@:
  end if
mov [__tmpReg_#reg],reg }


SECTION '.data' DATA READABLE WRITEABLE executable
                tflt          dd 2 dup (1.0,2)
               
section '.code' code readable writeable executable

Start:          sub     rsp,8
                ;match ff,x=Color, z { display `ff,13,10 }
                _push rax
       ; invoke MessageBox,0,'11',0,0

                ;Msg ff
                invoke    ExitProcess,0  
SECTION '.idata' IMPORT DATA READABLE WRITEABLE

     library  kernel32, 'KERNEL32.DLL',\
              user32,   'USER32.DLL',\
              winmm,    'WINMM.DLL',\
              msvcrt,   'MSVCRT.DLL'

 include 'fasmAPI\kernel32.inc'
 include 'fasmAPI\user32.inc'
 include 'fasmAPI\winmm.inc'
 include 'fasmAPI\msvcrt.inc'

; import shell32,DragQueryFile,'DragQueryFileA'
section '.bss' readable writeable
                UserNameDrop  rb      25600  
    

macro _push redd {
  if ~ defined __tmpReg_rrr ;#reg
     __tmpReg_rrr EQU 1
     jmp @f
     irps reg, rax rcx rbx rdx rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15 \{
                __tmpReg_\#reg   dq 0   \}
@@:
  end if
mov [__tmpReg_#redd],redd }