VB ping命令
我想用VB热行一个"ping 192.168.1.1 -t" 就像在开始-运行， 里面输ping 192.168.1.1 -t 一样.把返回结果（原原本本）返回到text1.text中.
请问各位朋友该怎么实现呢。谢谢大家了。
[解决办法]
'modCmdPipe.bas
'描述：cmd命令管道
'调用范例：MsgBox retunCmdResult("dir")
Option Explicit
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const STARTF_USESTDHANDLES = &H100&
Private Const STARTF_USESHOWWINDOW = &H1
Private Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle 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 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 Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As SECURITY_ATTRIBUTES, ByVal nSize As Long) As Long
Private Declare 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 lpCurrentDriectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, ByVal lpBuffer As String, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, ByVal lpOverlapped As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Public Function retunCmdResult(strCommand As String) As String
Dim Proc As PROCESS_INFORMATION '进程信息
Dim Start As STARTUPINFO '启动信息
Dim SecAttr As SECURITY_ATTRIBUTES '安全属性
Dim hReadPipe As Long '读取管道句柄
Dim hWritePipe As Long '写入管道句柄
Dim lngBytesRead As Long '读出数据的字节数
Dim strBuffer As String * 256 '读取管道的字符串buffer
Dim Command As String 'DOS命令
Dim ret As Long 'API函数返回值
Dim lpOutputs As String '读出的最终结果
'设置安全属性
With SecAttr
.nLength = LenB(SecAttr)
.bInheritHandle = True
.lpSecurityDescriptor = 0
End With
'创建管道
ret = CreatePipe(hReadPipe, hWritePipe, SecAttr, 0)
If ret = 0 Then
MsgBox "无法创建管道", vbExclamation, "错误"
Exit Function
End If
'设置进程启动前的信息
With Start
.cb = LenB(Start)
.dwFlags = STARTF_USESHOWWINDOW Or STARTF_USESTDHANDLES
.hStdOutput = hWritePipe '设置输出管道
.hStdError = hWritePipe '设置错误管道
End With
'启动进程
Command = strCommand 'DOS进程以ipconfig.exe为例
ret = CreateProcess(vbNullString, Command, SecAttr, SecAttr, True, NORMAL_PRIORITY_CLASS, ByVal 0, vbNullString, Start, Proc)
If ret = 0 Then
MsgBox "无法启动新进程", vbExclamation, "错误"
ret = CloseHandle(hWritePipe)
ret = CloseHandle(hReadPipe)
Exit Function
End If
'因为无需写入数据，所以先关闭写入管道。而且这里必须关闭此管道，否则将无法读取数据
ret = CloseHandle(hWritePipe)
'从输出管道读取数据，每次最多读取256字节
Do
ret = ReadFile(hReadPipe, strBuffer, 256, lngBytesRead, ByVal 0)
lpOutputs = lpOutputs & Left(strBuffer, lngBytesRead)
DoEvents
Loop While (ret <> 0) '当ret=0时说明ReadFile执行失败，已经没有数据可读了
'读取操作完成，关闭各句柄
ret = CloseHandle(Proc.hProcess)
ret = CloseHandle(Proc.hThread)
ret = CloseHandle(hReadPipe)
retunCmdResult = lpOutputs
End Function
