gistfile1.m

// cg is a set of objects that describe the properties of onscreen windows (app, frame, title, etc)
// this is comparing all of them to find the windows that are menubar items
NSSet *menubar = [NSSet setWithArray:[[cg allObjects] objectsAtIndexes:[[cg allObjects] indexesOfObjectsPassingTest:^BOOL(WindowObject *obj, NSUInteger idx, BOOL *stop) { return CGRectContainsRect(SystemMenuBarRect(), CGRectMake(obj.window_origin.x, obj.window_origin.y, obj.window_size.width, obj.window_size.height)); }]]];
/*
Notes:

static CGRect SystemMenuBarRect() {
	CGRect main_bounds = CGDisplayBounds(CGMainDisplayID());
	CGFloat system_height = [[NSStatusBar systemStatusBar] thickness];
	return CGRectMake(main_bounds.origin.x, main_bounds.origin.y, main_bounds.size.width, system_height);
}
*/