' ****************************************************************************************************************************** '
'
' --- Autor: Jhonjhon_123 (Jhon Jairo Pro Developer)
' --- Versión: 1.0
' --- Descripción: Shell a nivel local en windows
' --- Fallos y Mejoras: MSN; j.j.g.p@hotmail.com
' --- Licencia: GNU General Public License
'
' ****************************************************************************************************************************** '
Option Explicit
 
Private Declare Function PeekNamedPipe Lib "kernel32" (ByVal hNamedPipe As Long, lpBuffer As Any, ByVal nBufferSize As Long, lpBytesRead As Long, lpTotalBytesAvail As Long, lpBytesLeftThisMessage As Long) As Long
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As Any) As Long
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Long) As Long
 
Private Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As Any, ByVal nSize As Long) As Long
Private Declare Function CreateProcess Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, ByVal lpCommandLine As String, lpProcessAttributes As Any, lpThreadAttributes As Any, ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDriectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
 
Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long
 
Private Declare Function DuplicateHandle Lib "kernel32" (ByVal hSourceProcessHandle As Long, ByVal hSourceHandle As Long, ByVal hTargetProcessHandle As Long, lpTargetHandle As Long, ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwOptions As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
 
Private Const STARTF_USESTDHANDLES          As Long = &H100
Private Const STARTF_USESHOWWINDOW          As Long = &H1
Private Const DUPLICATE_SAME_ACCESS         As Long = &H2
Private Const NORMAL_PRIORITY_CLASS         As Long = &H20
 
 
Private Type SECURITY_ATTRIBUTES
    nLength                                As Long
    lpSecurityDescriptor                   As Long
    bInheritHandle                         As Long
End Type
 
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
 
Dim lHInput As Long
Dim lHOutput As Long
Dim lCmdID As Long
 
Public Sub StopShell()
 
If lHInput > 0 Then Call CloseHandle(lHInput)
 
If lHOutput > 0 Then Call CloseHandle(lHOutput)
 
If lCmdID > 0 Then Call TerminateProcess(lCmdID, ByVal 0&): Call CloseHandle(lCmdID)
 
End Sub
 
Public Function GetOutTextShell(sOut As String) As Boolean
Dim bBuffer() As Byte
Dim lLen As Long
Dim bRes As Boolean
Dim lLenBuff As Long
 
bRes = CBool(PeekNamedPipe(lHOutput, 0&, 0&, 0&, lLen, 0&))
 
If Not bRes Then Exit Function
 
If lLen <= 0 Then Exit Function
 
ReDim bBuffer(lLen)
 
If ReadFile(lHOutput, bBuffer(0), lLen, lLenBuff, ByVal 0&) = 0 Then Exit Function
 
sOut = Left(StrConv(bBuffer, vbUnicode), lLenBuff)
 
GetOutTextShell = True
 
End Function
 
Public Sub SendToShell(sCMD As String)
Dim sBytes() As Byte
Dim BytesWritten As Long
 
If lHInput = 0 Then Exit Sub
sCMD = sCMD & vbNewLine
sBytes = StrConv(sCMD, vbFromUnicode)
 
If WriteFile(lHInput, ByVal sCMD, Len(sCMD), BytesWritten, 0&) = 0 Then
    Exit Sub
End If
 
End Sub
 
Public Function StartShell() As Boolean
On Error GoTo Error
 
Dim tSecurityAttributes As SECURITY_ATTRIBUTES
Dim tStartInfo          As STARTUPINFO
Dim tProcessInfo        As PROCESS_INFORMATION
Dim lCurrentID          As Long
 
lCurrentID = GetCurrentProcess()
 
With tStartInfo
    .cb = Len(tStartInfo)
    .dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW
End With
 
With tSecurityAttributes
    .nLength = Len(tSecurityAttributes)
    .bInheritHandle = 1
End With
 
If CreatePipe(lHOutput, tStartInfo.hStdOutput, tSecurityAttributes, 0) = 0 Then
    GoTo Error
End If
 
If CreatePipe(tStartInfo.hStdInput, lHInput, tSecurityAttributes, 0) = 0 Then
    GoTo Error
End If
 
If DuplicateHandle(lCurrentID, tStartInfo.hStdOutput, lCurrentID, tStartInfo.hStdError, 0&, True, DUPLICATE_SAME_ACCESS) = 0 Then
    GoTo Error
End If
 
If CreateProcess(vbNullString, "cmd", tSecurityAttributes, tSecurityAttributes, 1, NORMAL_PRIORITY_CLASS, ByVal 0&, vbNullString, tStartInfo, tProcessInfo) = 0 Then
    GoTo Error
End If
 
With tProcessInfo
    Call CloseHandle(.hThread)
 
    lCmdID = .hProcess
 
    If .dwProcessID > 0 And .hProcess > 0 Then
        StartShell = True
    Else
        GoTo Error
    End If
End With
 
Exit Function
Error:
Call StopShell
StartShell = False
 
End Function