iczelion tut13[3]

                                ofn_pathmustexist or ofn_longnames or\
                                ofn_explorer or ofn_hidereadonly
                                invoke getopenfilename, addr ofn
                .if eax==true
                    invoke createfile,addr buffer,\
                                                generic_read ,\
                                                0,\
                                                null,open_existing,file_attribute_archive,\
                                                null
                    mov hfileread,eax
                    invoke createfilemapping,hfileread,null,page_readonly,0,0,null
                    mov     hmapfile,eax
                    mov     eax,offset buffer
                    movzx  edx,ofn.nfileoffset
                    add      eax,edx
                    invoke setwindowtext,hwnd,eax
                    invoke enablemenuitem,hmenu,idm_open,mf_grayed
                    invoke enablemenuitem,hmenu,idm_save,mf_enabled
                .endif
            .elseif ax==idm_save
                mov ofn.flags,ofn_longnames or\
                                ofn_explorer or ofn_hidereadonly
                invoke getsavefilename, addr ofn
                .if eax==true
                    invoke createfile,addr buffer,\