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: 0x800401cf
This table shows the most common 32-bit representations of this value.
Type
Value
Hex
0x800401cf
Signed
2147746255
Unsigned
-2147221041
Matching Symbols
This table lists the symbols that exactly match the value.
Symbol
Description
CONVERT10_E_LAST
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.