二级VBCreateProcess模块
来源:优易学  2011-10-10 9:49:48   【优易学:中国教育考试门户网】   资料下载   IT书店

  Attribute VB_Name = "Run_Command"
  Option Explicit
  Option Base 0
  Private Declare Function CreateProcess()Function CreateProcess Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, _
  ByVal lpCommandLine As String, lpProcessAttributes As SECURITY_ATTRIBUTES, lpThreadAttributes As SECURITY_ATTRIBUTES, _
  ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDirectory As String, _
  lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
  Private Declare Function CloseHandle()Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
  Private Declare Function ReadFile()Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As Long) As Long
  Private Declare Function WaitForSingleObject()Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
  Private Declare Function CreatePipe()Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As SECURITY_ATTRIBUTES, ByVal nSize As Long) As Long
  Private Type STARTUPINFO
  cb As Long
  lpReserved As String
  lpDesktop As String
  lpTitle As String
  dwX As Long
  dwY As Long
  dwXSize As Long
  dwYSize As Long
  dwXCountChars As Long
  dwYCountChars As Long
  dwFillAttribute As Long
  dwFlags As Long
  wShowWindow As Integer
  cbReserved2 As Integer
  lpReserved2 As Long
  hStdInput As Long
  hStdOutput As Long
  hStdError As Long
  End Type
  Private Type PROCESS_INFORMATION
  hProcess As Long
  hThread As Long
  dwProcessId As Long
  dwThreadId As Long
  End Type
  Private Type SECURITY_ATTRIBUTES
  nLength As Long
  lpSecurityDescriptor As Long
  bInheritHandle As Long
  End Type
  Private Const NORMAL_PRIORITY_CLASS As Long = &H20&
  Private Const STARTF_USESTDHANDLES As Long = &H100&
  Private Const STARTF_USESHOWWINDOW As Long = &H1&
  Private Const SW_HIDE As Long = 0&
  Private Const SW_NORMAL As Long = 1
  Private Const INFINITE As Long = &HFFFF&
   Public Function GetStrFromCommand()Function GetStrFromCommand(CommandLine As String) As String
  On Error Resume Next
  Dim si As STARTUPINFO ''used to send info the CreateProcess
  Dim pi As PROCESS_INFORMATION ''used to receive info about the created process
  Dim retval As Long ''return value
  Dim hRead As Long ''the handle to the read end of the pipe
  Dim hWrite As Long ''the handle to the write end of the pipe
  Dim sBuffer(0 To 63) As Byte ''the buffer to store data as we read it from the pipe
  Dim lgSize As Long ''returned number of bytes read by readfile
  Dim sa As SECURITY_ATTRIBUTES
  Dim strResult As String ''returned results of the command line
  With sa
  .nLength = Len(sa)
  .bInheritHandle = 1& ''inherit, needed for this to work
  .lpSecurityDescriptor = 0&
  End With
  retval = CreatePipe(hRead, hWrite, sa, 0&)
  With si
  .cb = Len(si)
  .dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW ''tell it to use (not ignore) the values below
  .wShowWindow = SW_HIDE
  .hStdOutput = hWrite ''pass the write end of the pipe as the processes standard output
  End With

 

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