Visual Basic FAQ

GetModuleUsage: Determine when a Shelled App has Ended (16-bit)
     
Posted:   Thursday December 26, 1996
Updated:   Monday December 26, 2011
     
Applies to:   VB3, VB4-16 on Windows 3.x
     
 Prerequisites
None.

This is a 16-bit FAQ to launch an application and wait for its closing before continuing executing VB code. The Windows 3x GetModuleUsage API is not implemented under the Win32 operating system.
 BAS Module Code
None.

 Form Code
Add a command button to a form along with the following code:

Option Explicit
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Copyright 1996-2011 VBnet/Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Distribution: You can freely use this code in your own
'               applications, but you may not reproduce 
'               or publish this code on any web site,
'               online service, or distribute as source 
'               on any media without express permission.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Private Declare Function GetModuleUsage Lib "kernel" _
   (ByVal hModule As Integer) As Integer


Sub Command1_Click()

   RunShell "c:\windows\notepad.exe"

End Sub


Private Sub RunShell (cmdline As String)

    Dim hProcess As Integer
    hProcess = Shell(cmdline, 1)

    While GetModuleUsage(hProcess)

        DoEvents

    Wend

   MsgBox "The Shelled process " & cmdline & " has ended."

End Sub
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