I am attempting to troubleshoot a VB6 SP3 application that is using the WININET functions. Apps in use IE5, DynaZip 4 aXControls, ADO (ODBC to VFP tables). The app never fails on Network - Internet Connection. The app never fails on Network - DSL internet connection. The app always fails on Modem (regardless of speed) - Internet connection.

I can download multiple files (150) without the problem. But when I download files larger than 1MB our systems lock. I need to use FTPOpenFile in combination with InternetReadFile so I can update a progress bar. Heres the process:

vbH = FreeFile()
Open File name..Binary.. #vbH
h1 = InternetOpen..
h2 = InternetConnect..

h3 = FTPOpenFile..
WHILE
InternetReadFile
PUT #vbH
Update Progress Bar
WEND

CLOSE #vbH (line that locks if file is bigger than 1MB)

InternetCloseHandle h3..

Other Internet handles are closed later.

Here's my questions:
Does VB have a session byte limit on data placed in a file?
Any reason why it locks up when the process is done and I'm closing the VB created local file?