'Redirects output from console program to textbox.
'
'Original bcx version of this program was made by
' dl <dl@tks.cjb.net>
'VB port was made by Jernej Simoncic <jernej@isg.si>
'Visit Jernejs site at [url]http://www2.arnes.si/~sopjsimo/[/url]
'
'Note: don't run plain DOS programs with this example
'under Windows 95,98 and ME, as the program freezes when
'execution of program is finnished.
 
Option Explicit
Private Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As SECURITY_ATTRIBUTES, ByVal nSize As Long) As Long
Private Declare Sub GetStartupInfo Lib "kernel32" Alias "GetStartupInfoA" (lpStartupInfo As STARTUPINFO)
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 SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String) 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 SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
 
Private Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Long
End Type
 
Private Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessId As Long
dwThreadId As Long
End Type
 
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 Byte
hStdInput As Long
hStdOutput As Long
hStdError As Long
End Type
 
Private Type OVERLAPPED
ternal As Long
ternalHigh As Long
offset As Long
OffsetHigh As Long
hEvent As Long
End Type
 
Private Const STARTF_USESHOWWINDOW = &H1
Private Const STARTF_USESTDHANDLES = &H100
Private Const SW_HIDE = 0
Private Const EM_SETSEL = &HB1
Private Const EM_REPLACESEL = &HC2
 
 
Sub Redirect(cmdLine As String, objTarget As Object)
Dim i%, t$
Dim pa As SECURITY_ATTRIBUTES
Dim pra As SECURITY_ATTRIBUTES
Dim tra As SECURITY_ATTRIBUTES
Dim pi As PROCESS_INFORMATION
Dim sui As STARTUPINFO
Dim hRead As Long
Dim hWrite As Long
Dim bRead As Long
Dim lpBuffer(1024) As Byte
pa.nLength = Len(pa)
pa.lpSecurityDescriptor = 0
pa.bInheritHandle = True
 
pra.nLength = Len(pra)
tra.nLength = Len(tra)
 
If CreatePipe(hRead, hWrite, pa, 0) <> 0 Then
    sui.cb = Len(sui)
    GetStartupInfo sui
    sui.hStdOutput = hWrite
    sui.hStdError = hWrite
    sui.dwFlags = STARTF_USESHOWWINDOW Or STARTF_USESTDHANDLES
    sui.wShowWindow = SW_HIDE
    If CreateProcess(vbNullString, cmdLine, pra, tra, True, 0, Null, vbNullString, sui, pi) <> 0 Then
        SetWindowText objTarget.hwnd, ""
        Do
            Erase lpBuffer()
            If ReadFile(hRead, lpBuffer(0), 1023, bRead, ByVal 0&) Then
                SendMessage objTarget.hwnd, EM_SETSEL, -1, 0
                SendMessage objTarget.hwnd, EM_REPLACESEL, False, lpBuffer(0)
                DoEvents
            Else
                CloseHandle pi.hThread
                CloseHandle pi.hProcess
                Exit Do
            End If
            CloseHandle hWrite
        Loop
        CloseHandle hRead
    End If
End If
End Sub