VB.Net and Excel cell change array

Hi, What i need is to hook up VB.Net 2005? to Excel 2003. I need to monitor a cell in Excel and when the value of this changes then load this value into a fixed length array in [login to view URL] form. ie sub Form 1 Array(i)=excelvalue i=i+1 end sub I would like this to be done with a hard coded excel sheet in the code, say in the C: drive. The value of the cell changes rannomly so a timer is no good, it would need to be in some sort of event. Thanks