Hello,

I use VB6 and XceedZip Compression Library 5.0.115.0

I have a strange bug with the Zip method.

BackgroundProcessing is not defined but it is False by default.
After Zip call, other form's event are launched. It's like a DoEvents call after Zip method...

Do you have a idea ?

It's my code

Set Zip = New XceedZip
With Zip
.License "....-....-....-...."
.CompressionLevel = xclMedium
.CompressionMethod = xcmDeflated
.PreservePaths = False
.ZipFilename = "ZipFile.zip"
.AddFilesToProcess "FileToZip.txt"
.ZipOpenedFiles = True

Ret = .Zip
'Here form's events are launched
If Ret <> xerSuccess And Ret <> xerWarnings Then
MessageErreur = Ret & " " & .GetErrorDescription(xvtError, Ret)
Exit Function
End If
End With

This is a normal behavior.

During some operations (like Zip(), Unzip(), etc) the component empties the message queue with calls to PeekMessage() and DispatchMessage(). That is why the UI continues to update and does not block.

This is done to support the <a href="http://doc.xceedsoft.com/products/XceedZip/Overview_of_the_DLL_API_interface.html">DLL API</a> <a href="http://doc.xceedsoft.com/products/XceedZip/DLL_API_Event_handling_by_Windows_messages.html">Event handling by Windows messages</a>.

---

Charles Bérubé-Rémillard
Technical Support
Xceed Software Inc.

Hello CharlesB,

Ok, but in this case the BackgroundProcessing = false is useless!