Where did you expect to receive debugger message? You have to have some debugging monitor. I used MONITOR (Vireo Software) before 5 years which displays of debug output from device drivers, and provides driver loading/unloading facilities for Windows 95, 98, and NT. On Windows NT, a supporting kernel mode driver (DBGMSG.SYS) captures debug output sent to DbgPrint. Now, I think you can find something similar on www.osr.com or through a seek on internet.