Codeswamp is a database of error codes generated from the original sources (e.g. header files) and this page was generated from it. I hope you find it useful.
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Value: 0x8009000f
This table shows the most common 32-bit representations of this value.
Type
Value
Hex
0x8009000f
Signed
2148073487
Unsigned
-2146893809
Matching Symbols
This table lists the symbols that exactly match the value.
Symbol
Description
NTE_EXISTS
Object already exists.
Click to search on msdn, to search on stackoverflow.
Resources
Interested in learning more about COM and HRESULTs? Don Box's excellent book not only guides you on how to implement client and server code, it also gives you a behind-the-scenes understanding of COM, all the way from RPC to DCOM. Definitely a worthy investment for anybody developing or mainintaing software with COM interfaces! Essential COM by Don Box
to search on msdn, 
to search on stackoverflow.