public PropertyValue FUNCTION3D_DESIGNATIONPREFIX {get; set;}

public:
property PropertyValue^ FUNCTION3D_DESIGNATIONPREFIX {
   PropertyValue^ get();
   void set (    PropertyValue^ value);
}

Property Value

Shows a grouping preceding sign for item designation for the item and all subordinate items, which provides for better arrangement of parts. The preceding sign is displayed in the "Full item designation" property and placed before the actual item designation.

Reference

Placement3DPropertyList Class
Placement3DPropertyList Members
Overload List