Help with Determining Shell Process Ends 
Author Message
 Help with Determining Shell Process Ends

Hi.  I am trying to determine when a shelled process ends in 32bit VB
4.0   Being resourceful I searched MSKB for VB and found article
Q129796 that describes the exact solution that I am looking for - only
it doesn't work!!!!!

here is the code.  I would really appreciate it if someone could get
this to work right and let me know.  Thanks for your time in reading

Adam Kelley

How a 32-bit App Can Determine When a Shelled Process Ends
Article ID: Q129796


Step-by-Step Example

1.Start a new project in Visual Basic.

Form1 is created by default.

2.Add the following code to the general declarations section of Form1:


                                        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


                                        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 _

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

Private Const INFINITE = -1&

Public Sub ExecCmd(cmdline$)


' Initialize the STARTUPINFO structure:
start.cb = Len(start)

' Start the shelled 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

3.Add the following code the Form_Click() event procedure of Form1:

Sub Form_Click ()

ExecCmd "notepad.exe"
MsgBox "Process Finished"

 End Sub

4.Press the F5 key to run the application.

5.Using the mouse, click the Form1 window. At this point the Notepad
application is shelled.

 NOTE: The MsgBox statement following the ExecCmd() subroutine is not
executed because the WaitForSingleObject() function prevents
                        it. The message box does not appear until
Notepad is closed when the user chooses Exit from Notepad's File menu
(ALT, F, X).

Sun, 30 May 1999 03:00:00 GMT  
 [ 1 post ] 

 Relevant Pages 

1. Help: How a 32-Bit app can determine when a shelled process ends

2. How a 32-Bit App Can Determine When a Shelled Process Ends, Article ID: Q129796

3. How a 32-Bit App Can Determine When a Shelled Process Ends

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6. How a 32-Bit APP can Determine When a Shelled Process Ends - Q129796

7. Help: Wait for shelled process to end

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9. Determine when process ends.

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