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VariantCopyInd (Windows Embedded CE 6.0)

  • 项目

1/6/2010

This function frees existing content of the destination variant and makes a copy of the source VARIANTARG, performing the necessary indirection if the source is specified to be VT_BYREF.

Syntax

HRESULT VariantCopyInd( 
  VARIANT FAR* pvarDest, 
  VARIANTARG FAR* pvargSrc 
);

Parameters

  • pvarDest
    [in] Pointer to the VARIANTARG that receives the copy.
  • pvargSrc
    [in] Pointer to the VARIANTARG that is copied.

Return Value

Returns the HRESULT values shown in the following table.

Value Description

S_OK

Success.

DISP_E_ARRAYISLOCKED

The variant contains an array that is locked.

DISP_E_BADVARTYPE

The source and destination have an invalid variant type (usually uninitialized).

E_OUTOFMEMORY

Memory could not be allocated for the copy.

E_INVALIDARG

The argument pvargSrc was VT_ARRAY.

Remarks

Passing invalid (and under some circumstances NULL) pointers to this function causes an unexpected termination of the application.

This function is useful when a copy of a variant is needed, and to guarantee that it is not VT_BYREF, such as when handling arguments in an implementation of IDispatch::Invoke.

For example, if the source is a (VT_BYREF | VT_I2), the destination will be a BYVAL | VT_I2. The same is true for all legal VT_BYREF combinations, including VT_VARIANT.

If pvargSrc is (VT_BYREF | VT_VARIANT), and the contained variant is VT_BYREF, the contained variant is also dereferenced.

This function frees existing contents of pvarDest.

Requirements

Header oleauto.h
Library oleaut32.lib
Windows Embedded CE Windows CE 2.0 and later

See Also

Reference

Automation Functions
VARIANT and VARIANTARG
IDispatch::Invoke