Adding events to usew windows controls

[Vicky]

I created a windows control. I need to define the event for a button
in it at the time i use it in apllications. I used the code below:
public event MouseEventHandler OkClick
{
add
{
button1.Click += value;
}
remove
{
button1.Click -= (MouseEventHandler)value;
}
}

But it is giving error that 'EverHadler' type cannot be implicitly
converted to 'MouseEventHandler'. Can someone tell me how to do it?