[VB6] Pipes

[Golden-One]

Hey Leute
Ich wollt mich erstmal nett vorstellen *gg*
Also ich hab eine etwas mehr als 1 jährige vb pause hinter mir und ich war nie fertig mit übung und so (aber schule ging vor). Jetzt weiß ich kaum wo ich weiter machn soll ^^ eines ist zu einfach anderes zu schwer xD... najo egal..
zum topic.

Ich bräuchte Informationen zum thema Pipe in VB.
Und zwar möchte ich, im groben und ganzen, eine Anwendung steuern und ihre Antworten bekommen (cmd.exe und antworten von z.b. Ping loggen), dazu bräucht ich Pipes(statt shells) wurde mir gesagt, nur fand ich bislang nichts vernümftiges dazu. Ich hoffe, dass mir hier weiter geholfen werden kann.

#mfg.

Goldi ^^

Edit: Man hatte sich vertan, es heißt Hook :roll:
Edit2: Dies wurde wiederlegt^^,es heißt doch Pipe :lol: es gibt wohl unterschiede in den funktionsweisen der methoden...

[Golden-One]

Hey
In nem anderen Board bin ich schon tiefer in ne Diskussion gekommen und habe schonmal nen sehr hilfreiches classmodul bekommen, aber es gibt einschränkungen :/ (achja es sind doch Pipes und keine Hooks)
Diskussion in nem anderen Board Klick

Beispiel Code

Option Explicit
Public ComBox As CDOS

Private Sub command1_Click()

    Set ComBox = New CDOS
    MsgBox ComBox.ExecuteCommand("ping localhost")
        
End Sub

+

CDOS.cls

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "CDOS"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_Ext_KEY = "SavedWithClassBuilder6" ,"Yes"
Attribute VB_Ext_KEY = "Top_Level" ,"Yes"
Option Explicit
'The CreatePipe function creates an anonymous pipe,
'and returns handles to the read and write ends of the pipe.
Private Declare Function CreatePipe Lib "kernel32" ( _
    phReadPipe As Long, _
    phWritePipe As Long, _
    lpPipeAttributes As Any, _
    ByVal nSize As Long) As Long
'Used to read the the pipe filled by the process create
'with the CretaProcessA function
Private Declare Function ReadFile Lib "kernel32" ( _
    ByVal hFile As Long, _
    ByVal lpBuffer As String, _
    ByVal nNumberOfBytesToRead As Long, _
    lpNumberOfBytesRead As Long, _
    ByVal lpOverlapped As Any) As Long
'Structure used by the CreateProcessA function
Private Type SECURITY_ATTRIBUTES
    nLength As Long
    lpSecurityDescriptor As Long
    bInheritHandle As Long
End Type
'Structure used by the CreateProcessA function
Private Type STARTUPINFO
    cb As Long
    lpReserved As Long
    lpDesktop As Long
    lpTitle As Long
    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
'Structure used by the CreateProcessA function
Private Type PROCESS_INFORMATION
    hProcess As Long
    hThread As Long
    dwProcessID As Long
    dwThreadID As Long
End Type
'This function launch the the commend and return the relative process
'into the PRECESS_INFORMATION structure
Private Declare Function CreateProcessA Lib "kernel32" ( _
    ByVal lpApplicationName As Long, _
    ByVal lpCommandLine As String, _
    lpProcessAttributes As SECURITY_ATTRIBUTES, _
    lpThreadAttributes As SECURITY_ATTRIBUTES, _
    ByVal bInheritHandles As Long, _
    ByVal dwCreationFlags As Long, _
    ByVal lpEnvironment As Long, _
    ByVal lpCurrentDirectory As Long, _
    lpStartupInfo As STARTUPINFO, _
    lpProcessInformation As PROCESS_INFORMATION) As Long
'Close opened handle
Private Declare Function CloseHandle Lib "kernel32" ( _
    ByVal hHandle As Long) As Long
'Consts for the above functions
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const STARTF_USESTDHANDLES = &H100&
Private Const STARTF_USESHOWWINDOW = &H1
Private mCommand As String          'Private variable for the CommandLine property
Private mOutputs As String          'Private variable for the ReadOnly Outputs property
'Event that notify the temporary buffer to the object
Public Event ReceiveOutputs(CommandOutputs As String)
'This property set and get the DOS command line
'It's possible to set this property directly from the
'parameter of the ExecuteCommand method
Public Property Let CommandLine(DOSCommand As String)
    mCommand = DOSCommand
End Property
Public Property Get CommandLine() As String
    CommandLine = mCommand
End Property
'This property ReadOnly get the complete output after
'a command execution
Public Property Get Outputs()
    Outputs = mOutputs
End Property
Public Function ExecuteCommand(Optional CommandLine As String) As String
    Dim proc As PROCESS_INFORMATION     'Process info filled by CreateProcessA
    Dim ret As Long                     'long variable for get the return value of the
                                        'API functions
    Dim start As STARTUPINFO            'StartUp Info passed to the CreateProceeeA
                                        'function
    Dim sa As SECURITY_ATTRIBUTES       'Security Attributes passeed to the
                                        'CreateProcessA function
    Dim hReadPipe As Long               'Read Pipe handle created by CreatePipe
    Dim hWritePipe As Long              'Write Pite handle created by CreatePipe
    Dim lngBytesread As Long            'Amount of byte read from the Read Pipe handle
    Dim strBuff As String * 256         'String buffer reading the Pipe
    'if the parameter is not empty update the CommandLine property
    If Len(CommandLine) > 0 Then
        mCommand = CommandLine
    End If
    
    'if the command line is empty then exit whit a error message
    If Len(mCommand) = 0 Then
        MsgBox "Command Line empty", vbCritical
        Exit Function
    End If
    
    'Create the Pipe
    sa.nLength = Len(sa)
    sa.bInheritHandle = 1&
    sa.lpSecurityDescriptor = 0&
    ret = CreatePipe(hReadPipe, hWritePipe, sa, 0)
    
    If ret = 0 Then
        'If an error occur during the Pipe creation exit
        MsgBox "CreatePipe failed. Error: " & Err.LastDllError, vbCritical
        Exit Function
    End If
    
    'Launch the command line application
    start.cb = Len(start)
    start.dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW
    'set the StdOutput and the StdError output to the same Write Pipe handle
    start.hStdOutput = hWritePipe
    start.hStdError = hWritePipe
    'Execute the command
    ret& = CreateProcessA(0&, mCommand, sa, sa, 1&, _
        NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)
        
    If ret <> 1 Then
        'if the command is not found ....
        MsgBox "File or command not found", vbCritical
        Exit Function
    End If
    
    'Now We can ... must close the hWritePipe
    ret = CloseHandle(hWritePipe)
    mOutputs = ""
    
    'Read the ReadPipe handle
    Do
        ret = ReadFile(hReadPipe, strBuff, 256, lngBytesread, 0&)
        mOutputs = mOutputs & Left(strBuff, lngBytesread)
        'Send data to the object via ReceiveOutputs event
        RaiseEvent ReceiveOutputs(Left(strBuff, lngBytesread))
    Loop While ret <> 0
    
    'Close the opened handles
    ret = CloseHandle(proc.hProcess)
    ret = CloseHandle(proc.hThread)
    ret = CloseHandle(hReadPipe)
    
    'Return the Outputs property with the entire DOS output
    ExecuteCommand = mOutputs
End Function