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TYPEDESC
A TYPEDESC, which describes the type of a variable, the return type of a
function, or the type of a function parameter, is defined as follows:
typedef struct FARSTRUCT tagTYPEDESC {
union {
/* VT_PTR|VT_SAFEAEEAY - the pointed-at type */
struct FARSTRUCT tagTYPEDESC FAR* lptdesc;
/* VT_CARRAY */
struct FARSTRUCT tagARRAYDESC FAR* lpadesc;
/* VT_USERDEFINED - this is used to get a TypeInfo for a user-
defined type */
HREFTYPE hreftype;
}UNION_NAME(u);
VARTYPE vt;
} TYPEDESC;
If the variable is VT_SAFEARRAY or VT_PTR, the union portion of the TYPEDESC
contains a pointer to a TYPEDESC that specifies the element type.
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