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Using Macros for Error Handling

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Applies to: Outlook 2013 | Outlook 2016

There are several macros for making it easier to work with HRESULT values.

There are two sets of macros that test for failure or success: HR_SUCCEEDED and HR_FAILED and SUCCEEDED and FAILED. SUCCEEDED is the same as HR_SUCCEEDED and FAILED is the same as HR_FAILED.

In this case, use the ResultFromScode macro to set the HRESULT variable to the corresponding HRESULT value for S_OK.

Commonly used macros are briefly described in the following table.

Macro Description
MAKE_HRESULT
Constructs an HRESULT from its components.
HR_SUCCEEDED
Tests an HRESULT for a success or warning condition.
HR_FAILED
Tests an HRESULT for an error condition.
HRESULT_CODE
Extracts the error code part of the HRESULT.
HRESULT_FACILITY
Extracts the facility from the HRESULT.
HRESULT_SEVERITY
Extracts the severity bit from the SEVERITY.
SUCCEEDED
Tests an HRESULT for a success or warning condition.
FAILED
Tests an HRESULT for an error condition.