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Synchronous processing of executables - VB will wait until the app. finishes before proceeding

Synchronous processing of executables - VB will wait until the app. finishes before proceeding

API Declarations


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

Private Declare Function CloseHandle Lib "kernel32" _
(ByVal hObject As Long) As Long

Private Declare Function GetExitCodeProcess Lib "kernel32" _
(ByVal hProcess As Long, lpExitCode As Long) As Long

Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1&



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' Class       : CCmdLineExec
' Description : Synchronous processing of executables
' Events
' ------------------------------------------------------


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

Public Function ExecCmd(cmdline As String) As Long
    Dim proc As PROCESS_INFORMATION
    Dim start As STARTUPINFO
    Dim lngRC As Long
    ' Initialize the STARTUPINFO structure:
    start.cb = Len(start)
    ' Start the shelled application:
    lngRC = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, _
       NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)
    ' Wait for the shelled application to finish:
    lngRC = WaitForSingleObject(proc.hProcess, INFINITE)
    Call GetExitCodeProcess(proc.hProcess, lngRC)
    Call CloseHandle(proc.hProcess)
    ExecCmd = lngRC
End Function