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XtAddCallback(3) Library Functions Manual XtAddCallback(3) NAME XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemoveCallbacks, XtRemoveAllCallbacks - add and remove callback procedures SYNTAX void XtAddCallback(Widget w, String callback_name, XtCallbackProc call- back, XtPointer client_data); void XtAddCallbacks(Widget w, String callback_name, XtCallbackList callbacks); void XtRemoveCallback(Widget w, String callback_name, XtCallbackProc callback, XtPointer client_data); void XtRemoveCallbacks(Widget w, String callback_name, XtCallbackList callbacks); void XtRemoveAllCallbacks(Widget w, String callback_name, ARGUMENTS callback Specifies the callback procedure. callbacks Specifies the null-terminated list of callback procedures and corresponding client data. callback_name Specifies the callback list to which the procedure is to be appended or deleted. or the client data to match on the reg- istered callback procedures client_data Specifies the argument that is to be passed to the specified procedure when it is invoked by XtCallbacks or NULL, . w Specifies the widget. DESCRIPTION The XtAddCallback function adds the specified callback procedure to the specified widget's callback list. The XtAddCallbacks add the specified list of callbacks to the specified widget's callback list. The XtRemoveCallback function removes a callback only if both the pro- cedure and the client data match. The XtRemoveCallbacks function removes the specified callback proce- dures from the specified widget's callback list. The XtRemoveAllCallbacks function removes all the callback procedures from the specified widget's callback list. SEE ALSO XtCallCallbacks(3) X Toolkit Intrinsics - C Language Interface Xlib - C Language X Interface XT FUNCTIONS X Version 11 XtAddCallback(3)