Share via

_variant_t::_variant_t

  • Article

Microsoft Specific

_variant_t( ) throw( );

_variant_t( const VARIANT& varSrc ) throw( _com_error );

_variant_t( const VARIANT* pVarSrc ) throw( _com_error );

_variant_t( const _variant_t& var_t_Src ) throw( _com_error );

_variant_t( VARIANT& varSrc**, bool** fCopy ) throw( _com_error );

_variant_t( short sSrc**, VARTYPE** vtSrc = VT_I2 ) throw( _com_error );

_variant_t( long lSrc**, VARTYPE** vtSrc = VT_I4 ) throw( _com_error );

_variant_t( float fltSrc ) throw( );

_variant_t( double dblSrc**, VARTYPE** vtSrc = VT_R8 ) throw( _com_error );

_variant_t( const CY& cySrc ) throw( );

_variant_t( const _bstr_t& bstrSrc ) throw( _com_error );

**_variant_t( const wchar_t ***wstrSrc ) throw( _com_error );

_variant_t( const char* strSrc ) throw( _com_error );

_variant_t( bool bSrc ) throw( );

_variant_t( IUnknown* pIUknownSrc**, bool** fAddRef = true ) throw( );

_variant_t( IDispatch* pDispSrc**, bool** fAddRef = true ) throw( );

_variant_t( const DECIMAL& decSrc ) throw( );

_variant_t( BYTE bSrc ) throw( );

Parameters

varSrc

a VARIANT object to be copied into the new _variant_t object

pVarSrc

pointer to a VARIANT object to be copied into the new _variant_t object

var_t_Src

a _variant_t object to be copied into the new _variant_t object

fCopy

if false, the supplied VARIANT object is attached to the new _variant_t object without making a new copy by VariantCopy

ISrc, sSrc

an integer value to be copied into the new _variant_t object

vtSrc

the VARTYPE for the new _variant_t object

fltSrc, dblSrc

a numerical value to be copied into the new _variant_t object

cySrc

a CY object to be copied into the new _variant_t object

bstrSrc

a _bstr_t object to be copied into the new _variant_t object

strSrc, wstrSrc

a string to be copied into the new _variant_t object

bSrc

a bool value to be copied into the new _variant_t object

pIUknownSrc

COM interface pointer to a VT_UNKNOWN object to be encapsulated into the new _variant_t object

pDispSrc

COM interface pointer to a VT_DISPATCH object to be encapsulated into the new _variant_t object

decSrc

a DECIMAL value to be copied into the new _variant_t object

bSrc

a BYTE value to be copied into the new _variant_t object

Remarks

Constructs a _variant_t object.

  • _variant_t( )   Constructs an empty _variant_t object, VT_EMPTY.

  • _variant_t( VARIANT& varSrc )   Constructs a _variant_t object from a copy of the VARIANT object. The variant type is retained.

  • _variant_t( VARIANT* pVarSrc )   Constructs a _variant_t object from a copy of the VARIANT object. The variant type is retained.

  • _variant_t( _variant_t& var_t_Src )   Constructs a _variant_t object from another _variant_t object. The variant type is retained.

  • _variant_t( VARIANT& varSrc**, bool** fCopy )   Constructs a _variant_t object from an existing VARIANT object. If fCopy is false, the VARIANT object is attached to the new object without making a copy.

  • _variant_t( short sSrc**, VARTYPE** vtSrc = VT_I2 )   Constructs a _variant_t object of type VT_I2 or VT_BOOL from a short integer value. Any other VARTYPE results in an E_INVALIDARG error.

  • _variant_t( long lSrc**, VARTYPE** vtSrc = VT_I4 )   Constructs a _variant_t object of type VT_I4, VT_BOOL, or VT_ERROR from a long integer value. Any other VARTYPE results in an E_INVALIDARG error.

  • _variant_t( float fltSrc )   Constructs a _variant_t object of type VT_R4 from a float numerical value.

  • _variant_t( double dblSrc**, VARTYPE** vtSrc = VT_R8 )   Constructs a _variant_t object of type VT_R8 or VT_DATE from a double numerical value. Any other VARTYPE results in an E_INVALIDARG error.

  • _variant_t( CY& cySrc )   Constructs a _variant_t object of type VT_CY from a CY object.

  • _variant_t( _bstr_t& bstrSrc )   Constructs a _variant_t object of type VT_BSTR from a _bstr_t object. A new BSTR is allocated.

  • **_variant_t( wchar_t ***wstrSrc )   Constructs a _variant_t object of type VT_BSTR from a Unicode string. A new BSTR is allocated.

  • _variant_t( char* strSrc )   Constructs a _variant_t object of type VT_BSTR from a string. A new BSTR is allocated.

  • _variant_t( bool bSrc )   Constructs a _variant_t object of type VT_BOOL from a bool value.

  • _variant_t( IUnknown* pIUknownSrc**, bool** fAddRef = true )   Constructs a _variant_t object of type VT_UNKNOWN from a COM interface pointer. If fAddRef is true, then AddRef is called on the supplied interface pointer to match the call to Release that will occur when the _variant_t object is destroyed. It is up to you to call Release on the supplied interface pointer. If fAddRef is false, this constructor takes ownership of the supplied interface pointer; do not call Release on the supplied interface pointer.

  • _variant_t( IDispatch* pDispSrc**, bool** fAddRef = true )   Constructs a _variant_t object of type VT_DISPATCH from a COM interface pointer. If fAddRef is true, then AddRef is called on the supplied interface pointer to match the call to Release that will occur when the _variant_t object is destroyed. It is up to you to call Release on the supplied interface pointer. If fAddRef is false, this constructor takes ownership of the supplied interface pointer; do not call Release on the supplied interface pointer.

  • _variant_t( DECIMAL& decSrc )   Constructs a _variant_t object of type VT_DECIMAL from a DECIMAL value.

  • _variant_t( BYTE bSrc )   Constructs a _variant_t object of type VT_UI1 from a BYTE value.

_variant_t Overview

END Microsoft Specific