title: Are Windows window classes case-sensitive?
body: <p>MS docs being clear as mud (and the class name strings not referenced very often), I was wondering whether the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms633574%28v=vs.85%29.aspx#class_name" rel="noreferrer">class name</a> of a Win32 <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms632596%28v=vs.85%29.aspx" rel="noreferrer">window class</a> is actually case sensitive?</p>