Solved

How can I tell if my program was run from other program (Shell command)?

Posted on 2009-04-01
7
132 Views
Last Modified: 2012-05-06
I have a vb6 program that calls another program vb5.  I want the vb5 program to only execute if it was called from the first one.  How can I test if it was called from the first vb6 program?.  If another command is better than the Shell I will use it.
If the user tries to execute the vb5 program I do not want it to work, Thank You
0
Comment
Question by:GarySB
  • 4
  • 3
7 Comments
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24041781
Pass in a "secret" command line parameter when you launch VB5 from VB6.  If the command line parameter is not present then exit out...

See Command: http://msdn.microsoft.com/en-us/library/aa262696.aspx
0
 

Author Comment

by:GarySB
ID: 24041850
Can I also end the vb6 program somehow? or will that just happen?  One other question. How can I stop the vb6 from executing the line following the Shell command.  It keeps going forward so now two programs are running and i may need to wait for a result to decide if I want to keep going with the vb6 program, Thank You.
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24043370
"...and i may need to wait for a result to decide if I want to keep going with the vb6 program"

You need a "shell and wait" function.:
(there are LOTS of different ways to do this)
Option Explicit
 

Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
 

Private Function ShellAndWait(ByVal fileName As String) As Long

    If Dir(fileName) <> "" Then

        Dim WShell As Object

        Dim oProcess As Object

        

        Set WShell = CreateObject("WScript.Shell")

        Set oProcess = WShell.Exec(fileName)
 

        Do While oProcess.Status = 0

            Sleep 50 ' keep CPU usage from ramping to 100%

            DoEvents ' keep app responsive

        Loop
 

        ShellAndWait = oProcess.ExitCode
 

        Set WShell = Nothing

        Set oProcess = Nothing

    Else

        MsgBox fileName, vbCritical, "File Not Found"

        ShellAndWait = 1 ' a non-zero value usually means something went wrong

    End If

End Function

Open in new window

0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:GarySB
ID: 24046173
Looks very good.  Cannot try until tomorrow night. Will let you know, Thank You
0
 

Author Comment

by:GarySB
ID: 24071340
This is the last section that I need in order for my code to work.  Can you please correct my code.  I am unable to get the right syntax between the two programs.  I've increased the points to 500 and will issue them today for you,  I appreciate your help, Thank You

VB6 Program:
     (not sure if this is correct because I am unable to see the MyVariable value in the VB5Prog program)
     Shell (App.Path & "\" & "VB5Prog.exe cmd/MyVariable")

VB5 Program:
(not sure how MyVariable is received)
StartUp Procedure
     If MyVariable = "" then End ?
0
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 24071707
That is what the first link was for, though I'm not actually sure it's available in VB5.

Try this in the VB5 program:
    (Startup Procedure)
    MyVariable = Command
    MsgBox MyVariable ' <--- what do you get here?
0
 

Author Closing Comment

by:GarySB
ID: 31565394
Idle_Mind, Thank you so much.
It gives exactly what you put there.
If you place myprogram.exe cmd/MyVariable
it prints cmd/MyVariable  It does not print the contents of the variable.
You do not even seem to need cmd. If I place Gary after the .exe it prints Gary in the VB5 program.  Again this is just what I needed, Thank you for getting back to me on the weekend.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction I needed to skip over some file processing within a For...Next loop in some old production code and wished that VB (classic) had a statement that would drop down to the end of the current iteration, bypassing the statements that were c…
You can of course define an array to hold data that is of a particular type like an array of Strings to hold customer names or an array of Doubles to hold customer sales, but what do you do if you want to coordinate that data? This article describes…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now