/**
* <summary>
* Selects an eraser instead of a pen for all subsequent drawing functions,
* except for bitmap copy functions.
* <para>
* Any point drawn using the eraser
* becomes transparent (as when the layer is empty), showing the other
* layers beneath it.
* </para>
* </summary>
* <returns>
* <c>0</c> if the call succeeds.
* </returns>
* <para>
* On failure, throws an exception or returns a negative error code.
* </para>
*/
public virtual int selectEraser()
{
return(_objptr.selectEraser());
}