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Terminate the process with an ErrorLevel code

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If your VB application is meant to be called from within a Ms-Dos batch file, you must be able to return Dos an error code. This can be accomplished using the ExitProcess API function:

Click here to copy the following block
Private Declare Sub ExitProcess Lib "kernel32" (ByVal uExitCode As Long)

' terminate the program and return ErrorLevel = 3
ExitProcess 3

Note that the ExitProcess API function is similar to the END command, in that it prevents all the usual clean up code from executing. Therefore, you must call it only after you've manually closed all forms, files and databases, released all memory and resources allocated through Windows, etc.
The following Ms-Dos batch program demonstrates how you can test the ErrorLevel returned by the VB application

Click here to copy the following block
START /W project1
REM ErrorLevel codes must be tested in reverse order
IF ERRORLEVEL 5 GOTO Err5
IF ERRORLEVEL 4 GOTO Err4
IF ERRORLEVEL 3 GOTO Err3
IF ERRORLEVEL 2 GOTO Err2
IF ERRORLEVEL 1 GOTO Err1

ECHO ErrorLevel = 0
GOTO Exit
:Err1
ECHO ErrorLevel = 1
GOTO Exit
:Err2
ECHO ErrorLevel = 2
GOTO Exit
:Err3
ECHO ErrorLevel = 3
GOTO Exit
:Err4
ECHO ErrorLevel = 4
GOTO Exit
:Err5
ECHO ErrorLevel = 5

:Exit
REM End of batch file

Note that you must use the syntax START /W if you're running under Windows 95.


Submitted By : Nayan Patel  (Member Since : 5/26/2004 12:23:06 PM)

Job Description : He is the moderator of this site and currently working as an independent consultant. He works with VB.net/ASP.net, SQL Server and other MS technologies. He is MCSD.net, MCDBA and MCSE. In his free time he likes to watch funny movies and doing oil painting.
View all (893) submissions by this author  (Birth Date : 7/14/1981 )


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