-- (id)initWithFrame:(NSRect)frame
-{
- [super initWithFrame:frame];
- impl = NULL;
- return self;
-}
-
-- (void)setImplementation: (wxWidgetCocoaImpl *) theImplementation
-{
- impl = theImplementation;
-}
-
-- (wxWidgetCocoaImpl*) implementation
-{
- return impl;
-}
-
-- (BOOL) isFlipped