How Excel VBA corporate with MSN Alerts?



I want MSN Alerts to remind me when an Excel cell value more than 5.

Can I make it?



For detail:

1.aa.xls and sheets bb has a cell, C5.( in Computer A )

2.when value of C5 = p` (5) ¡÷ MSN Alerts sent value p` to Computer B.

3.and shake my msn window )



Can it done in Excel VBA design?

Is it free?



Thanks for your reading.