HRESULT_SEVERITY

#define HRESULT_SEVERITY(hr) (((hr) >> 31) & 0x1)
 

Returns the severity bit from the HRESULT.

QuickInfo

  Windows NT: Use version 3.1 or later.
  Windows: Use Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winerror.h.