Error 0x800700D1

Value: -2147024687 | 0x800700D1 | 2147942609

What does it mean ?

ERROR_INVALID_SIGNAL_NUMBER  
The signal being posted is not correct.
Value: 209 | 0x00D1 | 0b0000000011010001

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

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