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Article View: comp.lang.basic.visual.3rdparty
Article #99

Re: HELP : Problem using shell

#99
From: Donald Stewart
Date: Thu, 15 Jul 1999 00:00
120 lines
4585 bytes
'***************************************************************
'Windows API/Global Declarations for :ExecCmd
'***************************************************************


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


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


Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long)
As Long
    Private Const NORMAL_PRIORITY_CLASS = &H20&
    Private Const INFINITE = -1&



Source Code:
Note:This code is formatted to be pasted directly into VB.
Pasting it into other editors may or may not work.



'***************************************************************
' Name: ExecCmd
' Description:Wait for Shelled app to end
This code will open Notepag by shelling it, and Then will wait until it
terminates to continue With the program. This is pretty cool, although I
have not been able to determine a lottle bug this program has. When the
program is shelled, the window dows not redraw until the shelled application
 is terminated.
' By: Semin Nurkic
'
'
' Inputs:None
'
' Returns:None
'
'Assumes:None
'
'Side Effects:None
'
'Code provided by Planet Source Code(tm) (http://www.PlanetSource
'     Code.com) 'as is', without warranties as to performance, fitness,
'     merchantability,and any other warranty (whether expressed or impl
'     ied).
'***************************************************************



Public Sub ExecCmd(cmdline$)


    Dim proc As PROCESS_INFORMATION
    Dim start As STARTUPINFO
    start.cb = Len(start)
    ' Shell the Application:
    ret& = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, NORMAL_PRIORITY_CLASS,
0&, 0&, start, proc)
    ' Wait for the shelled application to finish:
    ret& = WaitForSingleObject(proc.hProcess, INFINITE)
    ret& = CloseHandle(proc.hProcess)
End Sub

Now place this code in the Form_Click Event of the Startup form:
ExecCmd "notepad.exe"
MsgBox "Notepad Terminated!", vbExclamation, "Terminated!"



Hugo Palma wrote in message <3780FD98.33D7FD8E@mail.telepac.pt>...
>I'm using the shell command to execute a certain program but shell
>doesn't guarantee that the program will finish running when the next
>instruction in the program code is executed.
>How do i do, so that i can guarantee that the shell command finishes and
>only then will the program continue running ?
>Thanks.
>
>Please reply by e-mail to
>hmpalma@mail.telepac.pt
>
>
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From: "Donald Stewart" <d.stewart@qcsllc.net>
Subject: Re: HELP : Problem using shell
Date: 1999/07/15
Message-ID: <932070223.927.48@news.remarQ.com>
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