XPWidgetFunc t

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XPWidgetFunc_t

typedef int (* XPWidgetFunc_t)(
                                   XPWidgetMessage      inMessage,    
                                   XPWidgetID           inWidget,    
                                   intptr_t             inParam1,    
                                   intptr_t             inParam2);    
This function defines your custom widget's behavior. It will be called by the widgets library to send messages to your widget. The message and widget ID are passed in, as well as two ptr-width signed parameters whose meaning varies with the message. Return 1 to indicate that you have processed the message, 0 to indicate that you have not. For any message that is not understood, return 0.