COM data types

The table below shows the correspondence between COM data types and APL arrays.

OLE DataType	APL array
VT_BOOL	numeric scalar
VT_I1	numeric scalar
VT_I2	numeric scalar
VT_I4	numeric scalar
VT_R4	numeric scalar
VT_R8	numeric scalar
VT_BSTR	character vector
VT_CY	2-element numeric vector
VT_DATE	6 element numeric vector
VT_VARIANT	any array
VT_SAFEARRAY	any array (VT_ARRAY OF VT_VARIANT)
VT_DISPATCH	⎕OR of a namespace
VT_COLOR	3-element RGB

APL vectors may be described by pre-fixing the data type string with 'VT_ARRAY OF '. For example 'VT_ARRAY OF BSTR' specifies a vector of character vectors.

If the APL array is the ⎕OR of a namespace, its data type should be specified as 'VT_DISPATCH'.