Capturing DOS output from VB6

Posted on 2003-10-23
Last Modified: 2008-02-01
Hello all,

I am shelling this line of code from VB6 to compile various .java files into classes:

"C:\jdk1.3.1_02\bin\javac -d D:\Temp\SPACE\java_classes\ -classpath D:\Temp\SPACE\java_classes\;D:\Dev\Java\com\calibre\space\mail.jar;D:\Dev\Java\com\calibre\space\servlet.jar D:\Dev\Java\com\calibre\space\*.java"

This works fine if no problems are encountered in the compile process. But fails if one of the files doesn't compile. No error messages display though to tell the user something has gone wrong. If I run the above command in a DOS window, then I get some error messages that are useful. I was hoping to be able to catch these error messages & relay them back to my VB app so that the user can see what's going on if the command should fail.

I have searched the microsoft website & found some info (, but unfortunately I can't get their example to work!

If any one can offer any suggestions I would be most grateful. Thank you in advance for your help.

Question by:ConfusedMike
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Expert Comment

by:Ryan Chong
ID: 9605172

Author Comment

ID: 9605220
Hi Ryancys,

Thanks for your reply. Unfortunately I experienced the same problem that Trowa encountered when trying to get the Microsoft example code to work for the javac command (the app hangs on the ReadFile call).... and it seems that on that thread no solution was found to this problem :(


Expert Comment

ID: 9605687
The Microsoft has a good example for this:

Then read at tips 12

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Author Comment

ID: 9605722
Thanks Fantasy, but I'm not dealing with menu items (unless I've misunderstood!). I have however since found a working example..... I've lost the URL (doh). Is it possible to attach files to a thread, so that I can share it?


Expert Comment

ID: 9605784
Not, just follow the link, and choose the tip12 from the left menu. try again

Author Comment

ID: 9605793
Thanks man. As I say though, I now have a working example which I found elsewhere on the net. I'm going to try & find the link again so I can post it here for folk.

Author Comment

ID: 9605815
Got it. Here it is:

This worked a treat (first time & with the minimum of fuss!).

So I guess this question can now be closed. Thanks for your efforts.


Expert Comment

ID: 9606139
shd i suggest you some other alternative
why don't u put the dos output to a text file and then after the execution of dos command check that txt file(read it)

dos ha redirectional
dir>>a.txt will redirect dir to a.txt file

tell me if u liked that

Accepted Solution

PashaMod earned 0 total points
ID: 11023244
PAQed, with points refunded (250)

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