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没太理解是什么意思,我说的是ret = ReadFile(hReadPipe, sBuffer, 256, lngBytesRead, 0&)代码的返回值是0,根据Err.LastDllError=6的结果查询出来的错误代码是 ERROR_INVALID_HANDLE 应该说的是hReadPipe
CreateProcess(sCmdline, "", sa, sa, True, 0, 0, vbNullString, start, proc)
应该是ret = CreateProcess(sCmdline, "", sa, sa, True, 0, 0, vbNullString, start, proc)
写错了,该处的返回值是非0
Dim sa As SECURITY_ATTRIBUTES, si As STARTUPINFO, pi As PROCESS_INFORMATION
sa.nLength = Len(sa)
sa.bInheritHandle = True
si.cb = Len(si)
Res = CreateProcess(ApplicationName, CommandLine, sa, sa, True, NORMAL_PRIORITY_CLASS, ByVal 0&, vbNullString, si, pi)
If Res = 0 Then
information = MsgBox("不能创建子进程!", vbOKOnly + vbExclamation + vbSystemModal, "创建进程提示")
End If
'''''''''''''''''''''''
CloseHandle pi.hProcess
CloseHandle pi.hThread
移到 CloseHandle proc.hThread 语句后面。
你好,我刚试了下放到后面也是一样的。
我想了想,这个写是管道的写,写的过程是不是在创建进程的时候已经完成了呢?但是我发现个问题,就是当创建进程已经结束后,甚至程序都走完了,dos窗口才弹出来。
你好,按照您的方法该了下,也是一样的
出错的地方在 MsgBox Err.LastDllError '结果=0
MsgBox GetLastError '结果=0
ret = ReadFile(hReadPipe, sBuffer, 256, lngBytesRead, 0&)
MsgBox Err.LastDllError '结果=6
我查API帮助文档看到6代表的意思是 ERROR_INVALID_HANDLE 应该说的是hReadPipe
是 ret = ReadFile(hReadPipe, sBuffer, 256, lngBytesRead, 0&) 有问题~ 但是我debug看到hReadPipe是有值的
调用你的外部 exe 试试。
'Redirects output from console program to textbox.
'Requires two textboxes and one command button.
'Set MultiLine property of Text2 to true.
'
'Original bcx version of this program was made by
' dl <[email protected]>
'VB port was made by Jernej Simoncic <[email protected]>
'Visit Jernejs site at http://www2.arnes.si/~sopjsimo/
'
'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 LongPrivate Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Long
End TypePrivate Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessId As Long
dwThreadId As Long
End TypePrivate 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 TypePrivate Type OVERLAPPED
ternal As Long
ternalHigh As Long
offset As Long
OffsetHigh As Long
hEvent As Long
End TypePrivate Const STARTF_USESHOWWINDOW = &H1
Private Const STARTF_USESTDHANDLES = &H100
Private Const SW_HIDE = 0
Private Const EM_SETSEL = &HB1
Private Const EM_REPLACESEL = &HC2Private Sub Command1_Click()
Command1.Enabled = False
Redirect Text1.Text, Text2
Command1.Enabled = True
End Sub
Private Sub Form_Load()
Text1.Text = "ping"
End Sub
Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
If Command1.Enabled = False Then Cancel = True
End SubSub 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
好的 我先试试例子我该大概试了下 createprocess 返回值是0 抓取到错误代码 87 对应错误信息ERROR_INVALID_PARAMETER 我先找找原因 谢谢您啊先
http://bbs.csdn.net/topics/210031042
但是没有代码段,谢谢谢谢了。麻烦您回复下http://bbs.csdn.net/topics/390326659这个帖子把分给你,同时也谢谢chenjl1031,谢谢谢谢谢谢!高兴啊~~~~~~~~~
这里的 API-Guide 和 ApiViewer 是必备工具。