Is there any example-help available to develop custom tabbar with custom height?

Question

HI. I want some tutorial - sample on UITabbar customization. aspecially I want to change its height such that the gap between my view & tabbar does not appear.

Is there any code-help available ?

Thanks in advance

I tried :

#import "TabBarDemoAppDelegate.h"
@implementation TabBarDemoAppDelegate
@synthesize window, rootController, navigationController;
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
// Override point for customization after application launch
[window addSubview:rootController.view];
//rootController is UITabBarController obj.
rootController.tabBar.frame= CGRectMake(0,450,320,30);
[window makeKeyAndVisible];
}
- (void)dealloc {
[window release];
[rootController release];
[super dealloc];
}
@end