Welcome to the Board!
Here's an example:
<font face=Tahoma><SPAN style="color:#00007F">Private</SPAN> <SPAN style="color:#00007F">Sub</SPAN> Workbook_SheetChange(<SPAN style="color:#00007F">ByVal</SPAN> Sh <SPAN style="color:#00007F">As</SPAN> <SPAN style="color:#00007F">Object</SPAN>, <SPAN style="color:#00007F">ByVal</SPAN> Target <SPAN style="color:#00007F">As</SPAN> Range)
<SPAN style="color:#00007F">Dim</SPAN> rng <SPAN style="color:#00007F">As</SPAN> Range
<SPAN style="color:#007F00">' Only look at single cell changes</SPAN>
<SPAN style="color:#00007F">If</SPAN> Target.Count > 1 <SPAN style="color:#00007F">Then</SPAN> <SPAN style="color:#00007F">Exit</SPAN> <SPAN style="color:#00007F">Sub</SPAN>
<SPAN style="color:#007F00">' Set Target Range</SPAN>
Set rng = ActiveSheet.Range("A!")
<SPAN style="color:#007F00">' Only look at that range</SPAN>
<SPAN style="color:#00007F">If</SPAN> Intersect(Target, rng) <SPAN style="color:#00007F">Is</SPAN> <SPAN style="color:#00007F">Nothing</SPAN> <SPAN style="color:#00007F">Then</SPAN> <SPAN style="color:#00007F">Exit</SPAN> <SPAN style="color:#00007F">Sub</SPAN>
<SPAN style="color:#007F00">' Action if Condition(s) are met</SPAN>
<SPAN style="color:#007F00">' Do your thing here</SPAN>
<SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">Sub</SPAN></FONT>
Hope that helps,
Smitty