XChangeSaveSet, XAddToSaveSet, XRemoveFromSaveSet - change a client's save set

change_mode
                 Specifies the mode.  You can pass SetModeInsert or SetModeDelete.

       display   Specifies the connection to the X server.

       w         Specifies the window that you want to add or delete from the client's save-set.

       Depending  on  the specified mode, XChangeSaveSet either inserts or deletes the specified window from the
       client's save-set.  The specified window must have been created by some other client, or a BadMatch error
       results.

       XChangeSaveSet can generate BadMatch, BadValue, and BadWindow errors.

       The XAddToSaveSet function adds the specified window to the client's save-set.  The specified window must
       have been created by some other client, or a BadMatch error results.

       XAddToSaveSet can generate BadMatch and BadWindow errors.

       The XRemoveFromSaveSet function removes the specified window from the client's save-set.   The  specified
       window must have been created by some other client, or a BadMatch error results.

       XRemoveFromSaveSet can generate BadMatch and BadWindow errors.

BadMatch  Some  argument  or  pair of arguments has the correct type and range but fails to match in some
                 other way required by the request.

       BadValue  Some numeric value falls outside the range  of  values  accepted  by  the  request.   Unless  a
                 specific  range  is specified for an argument, the full range defined by the argument's type is
                 accepted.  Any argument defined as a set of alternatives can generate this error.

       BadWindow A value for a Window argument does not name a defined Window.

       XChangeSaveSet, XAddToSaveSet, XRemoveFromSaveSet - change a client's save set

XReparentWindow(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                                XChangeSaveSet(3)

       int XChangeSaveSet(Display *display, Window w, int change_mode);

       int XAddToSaveSet(Display *display, Window w);

       int XRemoveFromSaveSet(Display *display, Window w);