Error handling for methods can be done in either of two different
styles, according to the value of this property.
If the ThrowError property is set to False, the application
should check the return value of any method that is used, and report
errors based upon the documented value of the return code. It is the
responsibility of the application to interpret the error code, if it
is desired to explain the error in addition to reporting it.
If the ThrowError property is set to True, then errors
occurring within the control will be thrown to the container of the
control. In addition, the OnError event will fire. For
example, in Visual Basic, it is recommended that the OnError
mechanism be used to catch errors.
Note that if an error occurs while a property value is being
accessed, an error will be raised regardless of the value of the
ThrowError property, but the OnError event will not be