Wait till Shell operation is complete

[ae_jester]

Hi,

I am shelling to another application to process a file

Once this processing is complete (typically a few minutes), I need to shell out to another application.

Currently, I have the two shell commands one after another, but they both get called at the same time.

How do you determine when the first shell operation is complete before staring another one??????

Thanx for any suggestions!

[brenaaro]

Use this in a module

Private 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
 
Private Type PROCESS_INFORMATION
    hProcess As Long
    hThread As Long
    dwProcessId As Long
    dwThreadID As Long
End Type
 
Const NORMAL_PRIORITY_CLASS = &H20
Const IDLE_PRIORITY_CLASS = &H40
Const HIGH_PRIORITY_CLASS = &H80
 
Private Declare Function WaitForSingleObject Lib _
    "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds _
    As Long) As Long
 
Private 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
 
Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) _
    As Long
 
Public Sub ShellNWait(CommandLine As String, Optional WaitForMilliseconds As Long = -1&, Optional Priority As Long = NORMAL_PRIORITY_CLASS)
    Dim proc As PROCESS_INFORMATION
    Dim Start As STARTUPINFO
    Dim lRet As Long
On Error Resume Next
 
    'Initialize the STARTUPINFO structure:
    Start.cb = Len(Start)
    
    'Start the shelled application:
    lRet = CreateProcessA(0&, CommandLine, 0&, 0&, 1&, _
    Priority, 0&, 0&, Start, proc)
    
    'Wait for the shelled application to finish:
    'use -1 to specify no "timeout" length.
    lRet = WaitForSingleObject(proc.hProcess, WaitForMilliseconds)
    lRet = CloseHandle(proc.hProcess)
    
End Sub