Question

How to GZip files in VB6?

Asked by: softplus

Hi Experts!
I'm looking for an easy way to gzip files (and un-gzip them) in VB6. I'd rather not spend alot of money, so the professional compression libraries (dynazip, etc) are out of question, as the project is freeware.

Two things I have found:
- I found a "version" of the zlib which looked like it might work (zlibwapi.dll), but it seems to die completely whenever I try to gzip/ungzip files... or maybe I'm doing it incorrectly :). I can gzip/ungzip data blocks, but I'd need someone to help me write/read the .gz file headers.
- I also found the OCX from RSP Software, however, I can't seem to reach their website anywhere so I don't know if I can actually buy a version ($50 would be ok).

Anyone? I'm sure there must be wrappers out there for the zlib.dll?

Thanks!

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Asked On
2005-06-21 at 08:19:05ID21465591
Tags

gzip

,

vb6

Topic

Visual Basic Programming

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: tkalchevPosted on 2005-06-22 at 07:33:01ID: 14275544

 

by: tkalchevPosted on 2005-06-22 at 07:34:19ID: 14275554

Ops, sorry, didn't read you have already found it :(

 

by: tkalchevPosted on 2005-06-22 at 07:55:45ID: 14275804

Look here : http://www.miraplacid.com/msc/

There is a "Miraplacid Scripting Components Gzip (MSCGzip) 2.0" ActiveX component, which costs $31.95. There is alsp a trial/demo

 

by: softplusPosted on 2005-06-22 at 08:13:48ID: 14276019

I'd have no problems with the RSP program, I just can't seem to find a homepage or e-mail-address for the owner/programmer that still works so I'm not sure that I'd get a key if I ordered it.... You never know if the "shopping-cart" generates the key or if the programmer has to do it himself ;-).

The Miraplacid-object looks exactly like what I could use, thanks -- I'll check it out!

 

by: softplusPosted on 2005-06-23 at 01:12:44ID: 14282234

Bought it, thanks tkalchev!

 

by: DonPhillipePosted on 2009-01-10 at 08:55:15ID: 23344290

I looked for a free solution for this also, it took me 2 days but I finally found this free solution:

http://www.eggheadcafe.com/software/aspnet/31807544/wscriptshell-run-file-wi.aspx

I don't have any spaces in my file location strings and with none, the example below works om VB6.  In the link above there is an example for using multiple quotes to call stings with spaces in the file location string (i.e. C:\Program Files\Your Program.exe).

7-Zip will unzip the GZ tarred files for you and it seems to work, called from the shell routine of VB6 aka Visual Basic Classic aka Classic Visual Basic (to help others search out this scarcely documented technique).

Download free 7-Zip:

http://www.7-zip.org/
       


sLocalFolder = "D:\temp"
' sLocalFile  is set from a routine iterating through a list of files on a FTP server 
 
shell_string = sLocalFolder & "\7za.exe e -so " & sLocalFile & " >> " & sLocalFolder & "\accum.txt"
       
 rMsg = Shell(Environ("COMSPEC") & " /C " & shell_string, vbHide)
 
' in this example I am using a file accum.txt to receive all the appended output (via >> filename)from tarred server access logs; you likely have other 7za.exe parameters you want to use
        

                                              
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by: DonPhillipePosted on 2009-01-10 at 09:01:00ID: 23344310

I looked for a free solution for this also, it took me 2 days but I finally found this free solution:

http://www.eggheadcafe.com/software/aspnet/31807544/wscriptshell-run-file-wi.aspx

I don't have any spaces in my file location strings and with none, the example below works om VB6.  In the link above there is an example for using multiple quotes to call stings with spaces in the file location string (i.e. C:\Program Files\Your Program.exe).

7-Zip will unzip the GZ tarred files for you and it seems to work, called from the shell routine of VB6 aka Visual Basic Classic aka Classic Visual Basic (to help others search out this scarcely documented technique).

Download free 7-Zip:

http://www.7-zip.org/
       


sLocalFolder = "D:\temp"
' sLocalFile  is set from a routine iterating through a list of files on a FTP server 
 
shell_string = sLocalFolder & "\7za.exe e -so " & sLocalFile & " >> " & sLocalFolder & "\accum.txt"
       
 rMsg = Shell(Environ("COMSPEC") & " /C " & shell_string, vbHide)
 
' in this example I am using a file accum.txt to receive all the appended output (via >> filename)from tarred server access logs; you likely have other 7za.exe parameters you want to use
        

                                              
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