Can bindable properties be created for a User Control

[toptomato]

Hi I have a user control with the following property:
[Bindable(true), Category("Data"), DefaultValue("")]
public int TotalNumber
{
get
{
return (....);
}

set
{
(...) = value;
}
}

Now theoratically if i put this user control in a grid view then the TotalNumber property of this user contol should be bindable. But its not. What am i doing wrong. All help is appricated. Thanks