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XtInitializeWidgetClass - initialize
a widget class 
void XtInitializeWidgetClass(object_class) 
      WidgetClass object_class;
 
- object_class
- Specifies the object class to initialize. 
If
the specified widget class is already initialized,  XtInitializeWidgetClass
  returns immediately.
If the class initialization procedure registers type
converters, these type converters are not availble until the first object
of the class or subclass is created or XtInitializeWidgetClass   is called.
X Toolkit Intrinsics - C Language Interface 
Xlib - C Language X Interface 
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