How to VBA callback function when XMLHTTP onTimeOut?

Question

I\'m trying get xml data from webserver to excel, then I wrote a sendRequest function to call in excel

=sendRequest(\"http://abb.com/index.php?id=

Answer 1

The line;

XMLHTTP.OnTimeOut = OnTimeOutMessage

Is not a method assignment; rather it immediately executes OnTimeOutMessage() (and assigns its useless return value to OnTimeOut).

The equivalent line in JavaScript as per your example link correctly assigns a Function object to OnTimeOut for subsequent invokation - this is not supported by VBA.

Instead, you could trap the timeout error raised after .send or use early binding, WithEvents, & inline event handlers.