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XtInitializeWidgetClass - initialize a
widget class 
- void XtInitializeWidgetClass(WidgetClass 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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