shell调用dos命令执行 copy,如何在各个版本下都能用呀??
我想在vb程序中调用dos命令进行文件复制，是从一个服务器上的共享文件夹中将文件复制到本地，我是这样做的。
dim strcmd as string
strcmd= "cmd /c copy \\data\files\*.* d:\tmp\ "
shell strcmd,1
以上语句在win2000以下的系统是正确执行的。
可是对于win98/me则不能执行，因为低版本操作系统上没有 cmd.exe ，所以无法调用copy这个内部命令。
因为我知道win98/me中，进行命令行窗口用的是 command ，所以我将以上的代码改成：
dim strcmd as string
strcmd= "command /c copy \\data\files\*.* d:\tmp\ "
shell strcmd,1
可是提示出错。找不到command，
我应该如何做呀。
好象只能用 cmd,不能用command，不知为什么，写command时提示文件找不到
如果写成：
strcmd= "command.com /c copy \\data\files\*.* d:\tmp\ "
可以执行，但是文件复制不过来。
[解决办法]
类模块中填写
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
'---------------------
'窗体中填写
Option Explicit
Private WithEvents objDOS As DOSOutputs
Private Sub cmdExecute_Click()
On Error GoTo errore
objDOS.CommandLine = txtCommand.Text
objDOS.ExecuteCommand
txtCommand.Text = " "
Exit Sub
errore:
MsgBox (Err.Description & " - " & Err.Source & " - " & CStr(Err.Number))
End Sub
Private Sub cmdExit_Click()
Set objDOS = Nothing
End
End Sub
Private Sub Command1_Click()
txtOutputs.Text = " "
End Sub
Private Sub Form_Load()
Set objDOS = New DOSOutputs
End Sub
Private Sub objDOS_ReceiveOutputs(CommandOutputs As String)
txtOutputs.Text = txtOutputs.Text & CommandOutputs
DoEvents
Dim i As Integer, s As String
i = InStr(1, CommandOutputs, "Subnet Mask . . . . . . . . . . . : ")
If i Then
s = Trim(Mid(CommandOutputs, i + Len( "Subnet Mask . . . . . . . . . . . : "), 15))
i = InStr(s, vbTab)
If i Then
Me.Caption = Trim(Mid(s, 1, i - 4)) + "@ "
Else
Me.Caption = Split(s, ". ")(0) + ". " + Split(s, ". ")(1) + ". " + Split(s, ". ")(2) + ". " + CStr(Val(Split(s, ". ")(3))) + "@ "
End If
End If
End Sub
Private Sub txtCommand_Change()
cmdExecute.Default = True
End Sub
Private Sub txtOutputs_Change()
txtOutputs.SelStart = Len(txtOutputs.Text)
End Sub
[解决办法]
VB执行SHELL函数调用DOS的批处理命令,来执行含有COPY命令批处理命令能在WINDOWS各版本下运行.
