Writting Data to Tape Drive

HI,

I need to be able to write data to a 4mm DDS Tape Drive.
This is attached to the PC via SCSI and uses the windows 4mmdat.sys driver.

How can I get my program to access this device?
Do I have to call functions from the driver?
Is so how?

Are there any good resources on controlling external devices anywhere?

Many Thanks

OS: Windows XP Pro
Compiler: MS VC++ 6.0

It depends on the driver for that drive. You might be able to use DeviceIoControl or something, or open a file handle and use WriteFile, but it depends on the driver.