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_variant_t Extractors

  • Artículo

Microsoft Specific

operator short( ) const throw( _com_error );

operator long( ) const throw( _com_error);

operator float( ) const throw( _com_error );

operator double( ) const throw( _com_error );

operator CY( ) const throw( _com_error );

operator bool( ) const throw( _com_error );

operator DECIMAL( ) const throw( _com_error );

operator BYTE( ) const throw( _com_error );

operator _bstr_t( ) const throw( _com_error );

operator IDispatch*( ) const throw( _com_error );

operator IUnknown*( ) const throw( _com_error );

Remarks

Extracts raw data from an encapsulated VARIANT. If the VARIANT is not already the proper type, VariantChangeType is used to attempt a conversion, and an error is generated upon failure:

  • operator short( )   Extracts a short integer value.

  • operator long( )   Extracts a long integer value.

  • operator float( )   Extracts a float numerical value.

  • operator double( )   Extracts a double integer value.

  • operator CY( )   Extracts a CY object.

  • operator bool( )   Extracts a bool value.

  • operator DECIMAL( )   Extracts a DECIMAL value.

  • operator BYTE( )   Extracts a BYTE value.

  • operator _bstr_t( )   Extracts a string, which is encapsulated in a _bstr_t object.

  • operator IDispatch*( )   Extracts a dispinterface pointer from an encapsulated VARIANT. AddRef is called on the resulting pointer, so it is up to you to call Release to free it.

  • operator IUnknown*( )   Extracts a COM interface pointer from an encapsulated VARIANT. AddRef is called on the resulting pointer, so it is up to you to call Release to free it.

_variant_t Overview

END Microsoft Specific