So Im trying to compile a kernel mode driver I'm writing against the ddk rather than using vs.net.

First off, to use visual studio, read:

http://tiger.la.asu.edu/Quick_Ref/DeviceDriver.pdf

as well as there is a nice batch at http://www.osronline.com/article.cfm?article=43

but everyone says "hey - use the ddk - that what the compiler is there for"

Ok, so I keep getting an error on this line.

PHYSICAL_ADDRESS    PhysicalAddress; <-- error here -

PhysicalAddress = MmGetPhysicalAddress((void*)block);

error:

 error C2275: 'PHYSICAL_ADDRESS' : illegal use of this type as an expression

hmm... its used throughout the ddk samples that I can build. So I try PVOID, void*, ULONG all with the same result.

Then it occurs to me - the types are recognized, how about moving the defs to the top of the procedure (sorry - I've been so used to modern compilers

where you can gladly declare vars anywhere) and voila. Thats an hour of my life I'll never get back - thanks ddk guys for packaging that wonderful compiler with the ddk!!