Fl_Widget, Fl_Label classes .  
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| #define | FL_RESERVED_TYPE   100 | 
|  | Reserved type numbers (necessary for my cheapo RTTI) start here. 
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| typedef void | Fl_Callback(Fl_Widget *, void *) | 
|  | Default callback type definition for all fltk widgets (by far the most used) 
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| typedef void | Fl_Callback0(Fl_Widget *) | 
|  | One parameter callback type definition passing only the widget. 
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| typedef void | Fl_Callback1(Fl_Widget *, long) | 
|  | Callback type definition passing the widget and a long data value. 
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| typedef Fl_Callback * | Fl_Callback_p | 
|  | Default callback type pointer definition for all fltk widgets. 
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| typedef long | fl_intptr_t | 
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| typedef unsigned long | fl_uintptr_t | 
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◆ FL_RESERVED_TYPE
      
        
          | #define FL_RESERVED_TYPE   100 | 
      
 
Reserved type numbers (necessary for my cheapo RTTI) start here. 
Grep the header files for "RESERVED_TYPE" to find the next available number. 
 
 
◆ fl_intptr_t