* A copy of the binArea is made to be kept in the Document.
* @param binArea (binary)value to be set
* @param lgth new value length
* @param group Group number of the Entry
* @param elem Element number of the Entry
* A copy of the binArea is made to be kept in the Document.
* @param binArea (binary)value to be set
* @param lgth new value length
* @param group Group number of the Entry
* @param elem Element number of the Entry