（收集整理）MASM32文件及文件夹操作代码

;data

   string1 db "C:\Windows\system32\calc.exe",0

(...)

;proc

   ExtractFileName proc lpPath: DWORD
       mov esi, lpPath
       petla:
           mov al, [esi]
           inc esi
           test al, al
           jz koniec
           cmp al, '\'
           jne petla
           mov edx, esi
           jmp petla
       koniec:
           ret
   ExtractFileName endp

(...)

;usage (result in edx - pointer to first character of a filename)

   invoke ExtractFileName, addr string1

;show the result

   invoke MessageBox, 0, edx, 0, 0

.386
.model flat, stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

;SSSSSSSSSSSSSSSSSSSSSSSSSS
.data
;SSSSSSSSSSSSSSSSSSSSSSSSSS
g_MsgCaption db "取文件名",0
g_szFS1 db "c:\a\a.txt", 0
g_szFS2 db "c:b.txt", 0
g_szFS3 db "c.txt", 0

;SSSSSSSSSSSSSSSSSSSSSSSSSS
.code
;SSSSSSSSSSSSSSSSSSSSSSSSSS

;:::::::::::::::::::::::::::::::::::::::::::::::::::::
; 输入：lpszFileSpec=指向文件说明符字符串的指针（首地址）
; 返回值：eax=0，lpszFileSpec指向的文件说明符字符串为空
;         eax>0, 其值为指向文件名字符串的指针（首地址）
;:::::::::::::::::::::::::::::::::::::::::::::::::::::
GetFileName proc uses edi lpszFileSpec: dword
   mov eax, lpszFileSpec
   mov edi, eax
   test eax, eax
   jz @GetFileNameDone

   INVOKE lstrlen,eax
   test eax, eax
   jz @GetFileNameDone

   lea ecx,[eax+edi]
@GetFileNameNext:
   cmp ecx, edi
   jb @GetFileNameSon

   mov al,[ecx]
   cmp al, '\'
   jz @GetFileNameSon

   cmp al, ':'
   jz @GetFileNameSon
   sub ecx, 1
   jmp @GetFileNameNext
@GetFileNameSon:
   lea eax, [ecx+1]
@GetFileNameDone:
   ret
GetFileName endp


start:
   invoke GetFileName, offset g_szFS1
   invoke MessageBox, NULL, eax, offset g_MsgCaption, MB_OK
   invoke GetFileName, offset g_szFS2
   invoke MessageBox, NULL, eax, offset g_MsgCaption, MB_OK
   invoke GetFileName, offset g_szFS3
   invoke MessageBox, NULL, eax, offset g_MsgCaption, MB_OK
   invoke ExitProcess,NULL
end