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Unzip a file in VB code without pkunzip....

Posted on 1997-05-28
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Last Modified: 2010-05-18
I have to unzip a file in Visual Basic 4.0
How can I do that?
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Question by:yello
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vorlon earned 100 total points
ID: 1426605
Yello,
Here's a way that I use and might work for you. It might work because I'm using vb3. The principal for vb4 should be identical.

What I do is I create a pif file that actually calls the pkunzip dos command. I set the pif file to run minimized, without focus and to terminate as soon as the pkunzip command is done. Form the  vb code just shell out the pif filename like this:

Sub Form_Click ()
    Dim x As Integer
    x = Shell("c:\myfiles\myunzip.pif c:\ziplib\file1.zip c:\temp", 6)
End Sub

Here, the 6 is redundant since the pif file is already setup to run minimized.

The pif file is easy to create. Only 2 fields need to be entered: the program name (pkunzip.exe) and the program title (My Unzip, or something).

The string that gets passed to the shell command has the following structure:

command params

where command is the pif file, and params is the parameters passed to the pif file. In the example above:

c:\myfiles\myunzip.pif c:\ziplib\file1.zip c:\temp

the pif file will unzip file c:\ziplib\file1.zip into c:\temp.

Hope this helps
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Expert Comment

by:Chizl
ID: 1426606
http://www.apexsc.com/vb/ftp/misc/addzip.zip

The addZIP Compression Libraries are powerful, easy-to-use, PKZIP-compatible compression APIs for Windows. They allow the developer to add PKZIP-functionality to their programs. Includes source code (VB3) for a drag-and-drop .ZIP file manager.
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