Returning a value from a success callback function

Returning a value from a success callback function

I know this is a simple question with a simple answer, but I can't seem to wrap my brain around it. Sorry for the infantile nature of this post. Anyhow, I am making an AJAX call via JQuery and need the function to return a value from a calling function, like so:

function GetMyValue(varA, varB) {
   var ajaxOptions = {
      type: 'GET',
      dataType: 'json',
      url: 'http://my.someurl.com/service', //varA and varB used here but left out for simplicity
      success: function (data, textStatus) {
         var theReturnValue = data.dataResult;
        // I WANT TO RETURN THE VALUE HERE
      },
      error: function (date, textStatus, errorThrown) {
         alert('Error: Go Home');
      }
   }
   $.ajax(ajaxOptions); //The actual AJAX Call
}

function WrapperFunction(valueA, valueB) {
      var theReturn = GetMyValue(varA, varB);
      alert(theReturn);
}