StartSigning
Triggered when the user starts to write the signature (presses on with finger or stylus)
EndSigning
Triggered when the user finishes writing part of the signature (removes the finger or stylus) Caution: this does not mean that the signature may be incomplete as the user can write it in several goes. This event indicates that data is present.
Clear
Triggered when the object is deleted either by calling the "CLEAR" method or by double-clicking if the "CLEAR_ON_DOUBLE_CLICK" property is set to *TRUE.