SafeArrayCreate (Windows CE 5.0)

项目
09/14/2012

This function does the following:

Creates an array descriptor
Allocates and initializes the data for the array
Retrieves a pointer to the new array descriptor

SAFEARRAY * SafeArrayCreate( VARTYPE vt, unsigned int cDims, SAFEARRRAYBOUND FAR* rgsabound );

Parameters

vt
[in] Base type of the array (the VARTYPE of each element of the array). The VARTYPE is restricted to a subset of the variant types.

Neither VT_ARRAY nor the VT_BYREF flag can be set.

VT_EMPTY and VT_NULL are not valid base types for the array.

All other types are legal.
cDims
[in] Number of dimensions in the array.

The number cannot be changed after the array is created.
rgsabound
[in] Pointer to a vector of bounds (one for each dimension) to allocate for the array.

Return Values

Returns a pointer to a SAFEARRAY structure.

Remarks

Passing invalid (and under some circumstances NULL) pointers to this function causes an unexpected termination of the application. When implementing this function, test the legitimacy of the return value, as in the following sample code.

Example

HRESULT PASCAL __export CPoly::EnumPoints(IEnumVARIANT FAR* FAR* ppenum)
{
  unsigned int i;
  HRESULT hresult;
  VARIANT var;
  SAFEARRAY FAR* psa;
  CEnumPoint FAR* penum;
  POINTLINK FAR* ppointlink;
  SAFEARRAYBOUND rgsabound[1];
  rgsabound[0].lLbound = 0;
  rgsabound[0].cElements = m_cPoints;
  psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound);
  if(psa == NULL){HRESULT = ReportResult(0, E_OUTOFMEMORY, 0, 0);
    goto LError0}

  // Code omitted here for brevity.

LError0:;
  return hresult;
}

Requirements

OS Versions: Windows CE 2.0 and later.
Header: Oleauto.h.
Link Library: Oleaut32.lib.

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