Class Hierarchy
Fl_Window
   |
   +----Fl_Double_Window
Include Files
#include <FL/Fl_Double_Window.H>
Description
 The Fl_Double_Window class provides a double-buffered window.
 If possible this will use the X double buffering extension (Xdbe).  If
not, it will draw the window data into an off-screen pixmap, and then
copy it to the on-screen window.
It is highly recommended that you put the following code before the
first show() of any window in your program: 
Fl::visual(FL_DOUBLE|FL_INDEX)
 This makes sure you can use Xdbe on servers where double buffering
does not exist for every visual.
Methods
Creates a new Fl_Double_Window widget using the given
position, size, and label (title) string.
 The destructor also deletes all the children. This allows a
whole tree to be deleted at once, without having to keep a pointer to
all the children in the user code.