다음을 통해 공유

_variant_t Extractors

  • 아티클

 

The latest version of this topic can be found at _variant_t Extractors.

Microsoft Specific**

Extract data from the encapsulated VARIANT object.

Syntax

  
      operator short( ) const;   
operator long( ) const;   
operator float( ) const;   
operator double( ) const;   
operator CY( ) const;   
operator _bstr_t( ) const;   
operator IDispatch*( ) const;   
operator bool( ) const;   
operator IUnknown*( ) const;   
operator DECIMAL( ) const;   
operator BYTE( ) const;  
operator VARIANT() const throw();  
operator char() const;  
operator unsigned short() const;  
operator unsigned long() const;  
operator int() const;  
operator unsigned int() const;  
operator __int64() const;  
operator unsigned __int64() const;

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.

END Microsoft Specific

See Also

_variant_t Class