Best practice for local variable scope in a C++ callback
<p>I have a functioning C++ callback function, triggered by a user 'mouse down' event.  (The IDE is VS2010.)</p>

<p>With each call, I'd like to increment a simple count variable that is local to the callback's scope.  Simply put, what is the 'best practices' way to do this?</p>

<p>Thanks in advance for any opinions or directives.</p>
