XSetTransientForHint, XGetTransientForHint - set or read a window's WM_TRANSIENT_FOR property

display   Specifies the connection to the X server.

       w         Specifies the window.

       prop_window
                 Specifies the window that the WM_TRANSIENT_FOR property is to be set to.

       prop_window_return
                 Returns the WM_TRANSIENT_FOR property of the specified window.

       The  XSetTransientForHint  function  sets  the  WM_TRANSIENT_FOR  property of the specified window to the
       specified prop_window.

       XSetTransientForHint can generate BadAlloc and BadWindow errors.

       The XGetTransientForHint function returns the WM_TRANSIENT_FOR property for  the  specified  window.   It
       returns a nonzero status on success; otherwise, it returns a zero status.

       XGetTransientForHint can generate a BadWindow error.

BadAlloc  The server failed to allocate the requested resource or server memory.

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

       XSetTransientForHint, XGetTransientForHint - set or read a window's WM_TRANSIENT_FOR property

       WM_TRANSIENT_FOR
                 Set  by  application  programs  to  indicate  to  the window manager that a transient top-level
                 window, such as a dialog box.

XAllocClassHint(3),    XAllocIconSize(3),    XAllocSizeHints(3),    XAllocWMHints(3),     XSetCommand(3),
       XSetTextProperty(3),  XSetWMClientMachine(3), XSetWMColormapWindows(3), XSetWMIconName(3), XSetWMName(3),
       XSetWMProperties(3), XSetWMProtocols(3), XStringListToTextProperty(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                          XSetTransientForHint(3)

       int XSetTransientForHint(Display *display, Window w, Window prop_window);

       Status XGetTransientForHint(Display *display, Window w, Window *prop_window_return);