USB WritePort Does Not Set dwDataCompleted to 0 When Allocating New Buffer If Data Size Is Variable

When you attempt to print to some Hewlett-Packard Universal Serial Bus (USB) printers, some of the data sent to the printer may be lost.

If the WritePort buffer size is larger than the buffer that was used on the previous call, the first buffer is freed and a new one is allocated. However, dwDataCompleted does not get reset to 0. This could cause data loss to the printer port.

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.