This article was previously published under Q257751
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
The Umss.exe sample shows how two drivers can be used in tandem to support a universal serial bus (USB) mass storage device on a Microsoft Windows 98-based computer. The sample consists of source code for a Windows Driver Model (WDM) driver and an IOS driver, which work together to support a USB mass storage device. The Umss.exe file also contains a sample .inf file that shows how to install the two drivers.
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The Umss.exe sample demonstrates a simple functional IOS port driver. In addition, the Umss.exe sample demonstrates the following:
How to support a USB mass-storage device on a Windows 98-based computer that is compliant with the Control-Bulk-Interrupt Transport defined by the USB Mass Storage Device Class.
How to create a virtual child object in a WDM driver, and use it to load a separate driver.
How to communicate between a VxD and a WDM driver.
The sample IOS port driver and WDM driver require the Windows 98 DDK to build.