Creating a custom UIKeyBoard for iPhone

- (void)keyboardWillShow:(NSNotification *)note {
 
 // Just used to reference windows of our application while we iterate though them
UIWindow* tempWindow;
 
 // Because we cant get access to the UIKeyboard throught the SDK we will just use UIView. 
// UIKeyboard is a subclass of UIView anyways
UIView* keyboard;
 
 // Check each window in our application
for(int c = 0; c < [[[UIApplication sharedApplication] windows] count]; c ++)
{
    // Get a reference of the current window
    tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:c];
 
 // Loop through all views in the current window
    for(int i = 0; i < [tempWindow.subviews count]; i++)
    {
        // Get a reference to the current view
        keyboard = [tempWindow.subviews objectAtIndex:i];
 
 // From all the apps i have made, they keyboard view description always starts with <UIKeyboard so I did the following
        if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
        {
            // Only add the Decimal Button if the Keyboard showing is a number pad. (Set Manually through a BOOL)
            if (numberPadShowing && [keyboard viewWithTag:123] == nil) {
 
 // Set the Button Type.
                dot = [UIButton buttonWithType:UIButtonTypeCustom];
 
 // Position the button - I found these numbers align fine (0, 0 = top left of keyboard)
                dot.frame = CGRectMake(0, 163, 106, 53);
                dot.tag = 123;
 
 // Add images to our button so that it looks just like a native UI Element.
                [dot setImage:[UIImage imageNamed:@"dotNormal.png"] forState:UIControlStateNormal];
                [dot setImage:[UIImage imageNamed:@"dotHighlighted.png"] forState:UIControlStateHighlighted];
 
 //Add the button to the keyboard
                [keyboard addSubview:dot];
 
 // When the decimal button is pressed, we send a message to ourself (the AppDelegate) which will then post a notification that will then append a decimal in the UITextField in the Appropriate View Controller.
                [dot addTarget:self action:@selector(sendDecimal:)  forControlEvents:UIControlEventTouchUpInside];
 
 return;
            }
            else if (numberPadShowing && [keyboard viewWithTag:123])
            {
                [keyboard bringSubviewToFront:dot];
            }
            else if (!numberPadShowing)
            {
 
 for (UIView *v in [keyboard subviews]){
                    if ([v tag]==123)
                        [v removeFromSuperview];
                }
            }
        }
    }
}
}
 
 - (void)sendDecimal:(id)sender {
// The decimal was pressed
}