Add executable code (Win32 ASM) to the PE File)

; Main. ASM
PE File Operation demo Main Program, provides the dialog box interface and file opening function
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; Use nmake or the following command to compile and link:
; Ml/C/coff main. ASM
; RC main. RC
; Link/subsystem: Windows main. OBJ main. Res
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. 386
. Model flat, stdcall
Option Casemap: None
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; Include File Definition
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Include windows. inc
Include user32.inc
Includelib user32.lib
Include kernel32.inc
Includelib kernel32.lib
Include comdlg32.inc
Includelib comdlg32.lib
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; Equ Equivalent Definition
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Ico_main equ 1000
Dlg_main equ 1000
Idc_info equ 1001
Idm_main equ 2000
Idm_open equ 2001
Idm_exit equ 2002
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; Data Segment
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. Data?
Hinstance dd?
Hrichedit dd?
Hwinmain dd?
Hwinedit dd?
Szfilename dB max_path DUP (?)

. Const
Szdlledit dB 'riched20. dll ', 0
Szclassedit dB 'richedit20a ', 0
Szfont dB 'body', 0
Szextpe dB 'pe files', 0, '*. EXE; *. dll; *. scr; *. Fon; *. drv', 0
DB 'all files (*. *) ', 0,' *. * ', 0, 0
The szerr db' file format is incorrect! ', 0
Szerrformat db' is not a file in PE format! ', 0
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; Code segment
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. Code
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_ Appendinfo proc _ lpsz
Local @ stcr: charrange

Pushad
Invoke getwindowtextlength, hwinedit
MoV @ stcr. CPMin, eax
MoV @ stcr. cpmax, eax
Invoke sendmessage, hwinedit, em_exsetsel, 0, ADDR @ stcr
Invoke sendmessage, hwinedit, em_replacesel, false, _ lpsz
Popad
RET

_ Appendinfo endp
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Include _ processpefile. ASM
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_ Init proc
Local @ stcf: charformat

Invoke getdlgitem, hwinmain, idc_info
MoV hwinedit, eax
Invoke loadicon, hinstance, ico_main
Invoke sendmessage, hwinmain, wm_seticon, icon_big, eax
Invoke sendmessage, hwinedit, em_settextmode, tm_plaintext, 0
Invoke rtlzeromemory, ADDR @ stcf, sizeof @ stcf
MoV @ stcf. cbsize, sizeof @ stcf
MoV @ stcf. yheight, 9*20
MoV @ stcf. dwmask, cfm_face or cfm_size or cfm_bold
Invoke lstrcpy, ADDR @ stcf. szfacename, ADDR szfont
Invoke sendmessage, hwinedit, em_setcharformat, 0, ADDR @ stcf
Invoke sendmessage, hwinedit, em_exlimittext, 0,-1
RET

_ Init endp
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; Error handler
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_ Handler proc _ lpexceptionrecord, _ l1_h, _ lpcontext, _ lpdispatchercontext

Pushad
MoV ESI, _ lpexceptionrecord
MoV EDI, _ lpcontext
Assume ESI: PTR exception_record, EDI: PTR Context
MoV eax, _ l1_h
Push [eax + 0ch]
Pop [EDI]. regebp
Push [eax + 8]
Pop [EDI]. regeip
Push eax
Pop [EDI]. regesp
Assume ESI: Nothing, EDI: Nothing
Popad
MoV eax, predictioncontinueexecution
RET

_ Handler endp
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_ Openfile proc
Local @ stof: openfilename
Local @ hfile, @ dwfilesize, @ hmapfile, @ lpmemory

Invoke rtlzeromemory, ADDR @ stof, sizeof @ stof
MoV @ stof. lstructsize, sizeof @ stof
Push hwinmain
Pop @ stof. hwndowner
MoV @ stof. lpstrfilter, offset szextpe
MoV @ stof. lpstrfile, offset szfilename
MoV @ stof. nmaxfile, max_path
MoV @ stof. Flags, ofn_pathmustexist or ofn_filemustexist
Invoke getopenfilename, ADDR @ stof
. If! Eax
JMP @ F
. Endif
; **************************************** ****************************
; Open the file and create the file mapping
; **************************************** ****************************
Invoke createfile, ADDR szfilename, generic_read, file_assist_read or/
File_share_write, null, open_existing, file_attribute_archive, null
. If eax! = Invalid_handle_value
MoV @ hfile, eax
Invoke getfilesize, eax, null
MoV @ dwfilesize, eax
. If eax
Invoke createfilemapping, @ hfile, null, page_readonly, 0, 0, null
. If eax
MoV @ hmapfile, eax
Invoke mapviewoffile, eax, file_map_read, 0, 0
. If eax
MoV @ lpmemory, eax
; **************************************** ****************************
; Create a seh structure for error handling
; **************************************** ****************************
Assume FS: Nothing
Push EBP
Push offset _ errformat
Push offset _ Handler
Push FS: [0]
MoV FS: [0], ESP
; **************************************** ****************************
; Check whether PE files are valid
; **************************************** ****************************
MoV ESI, @ lpmemory
Assume ESI: PTR image_dos_header
. If [esi]. e_magic! = Image_dos_signature
JMP _ errformat
. Endif
Add ESI, [esi]. e_lfanew
Assume ESI: PTR image_nt_headers
. If [esi]. signature! = Image_nt_signature
JMP _ errformat
. Endif
Invoke _ processpefile, @ lpmemory, ESI, @ dwfilesize
JMP _ errorexit
_ Errformat:
Invoke MessageBox, hwinmain, ADDR szerrformat, null, mb_ OK
_ Errorexit:
Pop FS: [0]
Add ESP, 0ch
Invoke unmapviewoffile, @ lpmemory
. Endif
Invoke closehandle, @ hmapfile
. Endif
Invoke closehandle, @ hfile
. Endif
. Endif
@@:
RET

_ Openfile endp
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_ Procdlgmain proc uses ebx edi esi hwnd, wmsg, wparam, lparam

MoV eax, wmsg
. If eax = wm_close
Invoke enddialog, hwnd, null
. Elseif eax = wm_initdialog
Push hwnd
Pop hwinmain
Call _ init
. Elseif eax = wm_command
MoV eax, wparam
. If AX = idm_open
Call _ openfile
. Elseif AX = idm_exit
Invoke enddialog, hwnd, null
. Endif
. Else
MoV eax, false
RET
. Endif
MoV eax, true
RET

_ Procdlgmain endp
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Start:
Invoke loadlibrary, offset szdlledit
MoV hrichedit, eax
Invoke getmodulehandle, null
MoV hinstance, eax
Invoke dialogboxparam, hinstance, dlg_main, null, offset _ procdlgmain, null
Invoke freelibrary, hrichedit
Invoke exitprocess, null
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End start