include 'win32ax.inc'
 
    .data
        t1 db 'sindlll',0
        t2 db 'damedll',0
 
 
    .code
    start:
        stdcall prueba,t1,t2
        ret
 
        proc prueba,t1,t2
            mov esi,[t1]
            mov ecx,[t2]
 
           push 0
           push esi
           push ecx
           push 0
           call [MessageBoxA]
           ret
 
         endp
    .end start
 

format PE GUI 4.0 DLL
entry DllEntryPoint
 
include 'win32a.inc'
 
section '.data'
 
dato1 db 'hellooo',0
dato2 db 'agurrrr',0
 
 
section '.text' code readable executable
 
proc DllEntryPoint hinstDLL,fdwReason,lpvReserved
 
pushad
push dato1
push dato2
mov eax, 0x00402010 ; la direccion de la funcion prueba
call eax
add esp,8
popad
endp    
 

section '.reloc' fixups data discardable

 
; DLL creation example
 
format PE GUI 4.0 DLL
entry DllEntryPoint
 
include 'win32a.inc'
 
section '.text' code readable executable
 
proc DllEntryPoint hinstDLL,fdwReason,lpvReserved
	mov	eax,TRUE
	ret
endp
 
; VOID ShowErrorMessage(HWND hWnd,DWORD dwError);
 
proc ShowErrorMessage hWnd,dwError
  local lpBuffer:DWORD
	lea	eax,[lpBuffer]
	invoke	FormatMessage,FORMAT_MESSAGE_ALLOCATE_BUFFER+FORMAT_MESSAGE_FROM_SYSTEM,0,[dwError],LANG_NEUTRAL,eax,0,0
	invoke	MessageBox,[hWnd],[lpBuffer],NULL,MB_ICONERROR+MB_OK
	invoke	LocalFree,[lpBuffer]
	ret
endp
 
; VOID ShowLastError(HWND hWnd);
 
proc ShowLastError hWnd
	invoke	GetLastError
	stdcall ShowErrorMessage,[hWnd],eax
	ret
endp
 
section '.idata' import data readable writeable
;..............imports
 
section '.reloc' fixups data discardable
 
 

section '.reloc' data discardable fixups 
if ~ $-$$  
        dd      0,8 ;empty fixups section iff no other fixups  
end if