Mohammed Rashad wrote: > i need to develop a usb driver for windows XP. the new driver should > replace the existing USB driver This is simply not enough information. What kind of USB device do you need to support? You say there is an existing driver for the device. Why do you need to replace it? What do you need to change? In many cases, you can write a filter driver to wrap around an existing driver to add (or subtract) certain functions. -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc. ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/