Gets the Uid of the last shape.
// Delphi public function GetLastUid : TGIS_Uid; virtual;
// C++ Builder public: virtual TGIS_Uid* GetLastUid(void);
|TGIS_Uid||0 if Uid not assigned (in fact, only for pixel layers) or Uid value.|
Use this method to peek at the last attached Uid. Be aware that the Uid can point to a non-existing (for example, already deleted) shape.