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.
Click to search on msdn, to search on stackoverflow.
Value: 0x803c0100
This table shows the most common 32-bit representations of this value.
Type
Value
Hex
0x803c0100
Signed
2151416064
Unsigned
-2143551232
Matching Symbols
This table lists the symbols that exactly match the value.
Symbol
Description
SDIAG_E_CANCELLED
The operation was cancelled.
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.