Creates a one-dimensional array. A safe array created with SafeArrayCreateVector is a fixed size, so the constant FADF_FIXEDSIZE is always set.
SafeArrayCreateVector allocates a single block of memory containing a SAFEARRAY structure for a single-dimension array (24 bytes), immediately followed by the array data. All of the existing safe array functions work correctly for safe arrays that are allocated with SafeArrayCreateVector.
A SafeArrayCreateVector is allocated as a single block of memory. Both the SafeArray descriptor and the array data block are allocated contiguously in one allocation, which speeds up array allocation. However, a user can allocate the descriptor and data area separately using the SafeArrayAllocDescriptor and SafeArrayAllocData calls.