pcDatatypes (PLONG) - input
A
pointer to a value indicating the maximum number of data types. On return,
the value is updated to show the number of data types returned.
papszDatatypes (PSZ) - input
A
pointer to an array of pointers that address the locations for the returned
data type names. Each location must be an array of 16 characters to accommodate
a name of the maximum length with its terminating NULL.
fSuccess (BOOL) - returns