[MSDN Library June 1998] HRESULT_SEVERITY (100%)

MSDN Library Visual Studio 6.0 > Specifications > Technologies and Languages > Component Object Model (COM) Specification 0.9 > Chapter 3: Objects and Interfaces > Error Codes and Error Handling

[MSDN Library June 1998] HRESULT_SEVERITY (33.6758893280632%)

MSDN Library Visual Studio 6.0 > Platform SDK > COM and ActiveX Object Services > COM > Reference > Functions