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Index > Windows > error:about ReadProcessMemory buffer size

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zjlcc



Joined: 23 Jul 2003
Posts: 32
Location: china
zjlcc
Code:
format PE GUI 4.0 on 'nul'

entry start

include 'myinclude.inc'

start:
  invoke GetStartupInfo,startinfo
  invoke CreateProcess,Notepad_EXE,NULL,NULL,NULL,FALSE,20h,NULL,NULL,startinfo,pinfo
  mov eax,1009000h ;eax is notepad.exe address in my xp os,so sorry ,but it`s no important  
  invoke ReadProcessMemory,dword[pinfo],eax,buf,buf_size,0
  invoke ExitProcess,0

  Notepad_EXE db 'd:\windows\notepad.exe',0
  buf_size=40960       ;ReadProcessMemory can read!
;  buf_size=40960+1     ;ReadProcessMemory can not read! why?
  buf rb buf_size
  startinfo STARTUPINFO
  pinfo PROCESSINFO
    
Post 15 Dec 2004, 06:11
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mike.dld



Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk
mike.dld
maybe that?
Win32 Programmes's Guide wrote:
lpBaseAddress

Points to the base address in the specified process to be read. Before any data transfer occurs, the system verifies that all data in the base address and memory of the specified size is accessible for read access. If this is the case, the function proceeds; otherwise, the function fails.
Post 15 Dec 2004, 09:14
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zjlcc



Joined: 23 Jul 2003
Posts: 32
Location: china
zjlcc
i find it
thank mike.dld Very Happy
Post 15 Dec 2004, 10:09
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