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XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - ¥³¡¼¥ë¥Ð¥Ã¥¯¤ò½èÍý¤¹¤ë

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void XtCallCallbacks(w, callback_name, call_data)
Widget w;
String callback_name;
XtPointer call_data;

void XtCallCallbackList(w, callbacks, call_data)
Widget w;
XtCallbackList callbacks;
XtPointer call_data;

typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome} XtCallbackStatus;

XtCallbackStatus XtHasCallbacks(w, callback_name)
Widget w;
String callback_name;

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call_data

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callbacks

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w

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