Inserts one attribute into the array.
* The attribute data is a simple array of data_type elements of count length. \n
* Data is duplicated if not NULL, else data is initialized with zeros.
* When NULL is specified use the Get method to retrieve a pointer to the data
* so you can initialize it with other values.
* See also \ref imDataType.
Inserts one attribute into the array. * The attribute data is a simple array of data_type elements of count length. \n * Data is duplicated if not NULL, else data is initialized with zeros. * When NULL is specified use the Get method to retrieve a pointer to the data * so you can initialize it with other values. * See also \ref imDataType.