_com_error::WCode
Microsoft Specific
Retrieves the 16-bit error code mapped into the encapsulated HRESULT
.
Syntax
WORD WCode ( ) const throw();
Return value
If the HRESULT
is within the range 0x80040200 to 0x8004FFFF, the WCode
method returns the HRESULT
minus 0x80040200; otherwise, it returns zero.
Remarks
The WCode
method is used to undo a mapping that happens in the COM support code. The wrapper for a dispinterface
property or method calls a support routine that packages the arguments and calls IDispatch::Invoke
. Upon return, if a failure HRESULT
of DISP_E_EXCEPTION
is returned, the error information is retrieved from the EXCEPINFO
structure passed to IDispatch::Invoke
. The error code can either be a 16-bit value stored in the wCode
member of the EXCEPINFO
structure or a full 32-bit value in the scode
member of the EXCEPINFO
structure. If a 16-bit wCode
is returned, it must first be mapped to a 32-bit failure HRESULT
.
END Microsoft Specific
See also
_com_error::HRESULTToWCode
_com_error::WCodeToHRESULT
_com_error
class
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