请教一个等待shell()结束的问题
抓头啊……按照网上找的资料，下面代码的效果应该是调用rar来打包，打包结束后弹出提示框“o”。
但是真心没用啊。一运行就弹框啊，根本就没有等待啊，不理解啊。。
使用循环判断GetExitCodeProcess返回值的办法我也试过了，一样没有等待。
我的环境是Win7x64+vs2010.xp+vs2010我也试过，也行不通。
请各位高手指点指点我吧。。。
Public Class Form1
Private Const SYNCHRONIZE = &H100000
Private Const INFINITE = &HFFFFFFFF
Private Const WAIT_TIMEOUT = &H102&
Private Declare Function OpenProcess Lib "kernel32" _
(ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" _
(ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim pid, pHnd As Long
Dim rar As String
rar = "C:\Program Files\WinRAR\WinRAR.exe"
'pid = Shell(rar & " a -ep e:\test.zip e:\MP3\*.*", vbNormalFocus)
pHnd = OpenProcess(SYNCHRONIZE, 0, pid)
If pHnd <> 0 Then
Call WaitForSingleObject(pHnd, 30000)
CloseHandle(pHnd)
End If
MsgBox("o")
End Sub
[解决办法]
首先建立一个模块(module):
Option Explicit
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
Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessID As Long
dwThreadID As Long
End Type
Global Const NORMAL_PRIORITY_CLASS = &H20&
Global Const INFINITE = -1&
Declare Function CloseHandle Lib "kernel32" (hObject As Long) As Boolean
Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Declare Function CreateProcessA Lib "kernel32" ( _
ByVal lpApplicationName As Long, _
ByVal lpCommandLine As String, ByVal lpProcessAttributes As Long, ByVal _
lpThreadAttributes As Long, 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
Public Sub ShellAndWait(cmdline$)
Dim NameOfProc As PROCESS_INFORMATION
Dim NameStart As STARTUPINFO
Dim X As Long
NameStart.cb = Len(NameStart)
X = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, NORMAL_PRIORITY_CLASS, _
0&, 0&, NameStart, NameOfProc)
X = WaitForSingleObject(NameOfProc.hProcess, INFINITE)
X = CloseHandle(NameOfProc.hProcess)
End Sub
Private Sub Command1_Click()
Dim AppToLaunch As String
AppToLaunch = "c:\win95\notepad.exe"
ShellAndWait AppToLaunch
End Sub
