Assigns the CXlOper to be an array, sets it to a size and allocates the memory to contain its items
[C++]
void AllocArray(
   USHORT usRows,
   USHORT usCols
);
void AllocArray(
   USHORT usRows,
   USHORT usCols,
   const CXlOper& xloFill
);
The number of rows to be allocated in the array.
The number of columns to be allocated in the array.
A value which will be used to initialise all the cells in the array.
This function sets a CXlOper to be an array and sets its size. 
            It then populates it either with #N/A (first variant), or with xloFill 
            (second variant). Use this function if you are returning an array of mixed cells, such as strings and numbers 
            in a single array. 
            If you are returning arrays of a single type, then you will find the 
            FromMatrix() and FromVector()
            functions simpler and quicker to use.
Header: xllplus.h