Does VBA have any built in functions that test if a
string is properly formatted in minutes and seconds
notation such as: mm:ss???

For example, if the function is given a string value
of "1:22" or "0:22" or ":45", then the function should
return TRUE! However, the function would return
false if it was given strings such as: "6a:20" or "hello" etc...

thnx