Substring based on position in string

I'm trying to figure out a way to cut a particular substring out of a string, based on the start and end points of the substring.

For instance, I have code right now that will take in this example string:

"abcde + 1234 abcde"

And return two variables: a = 7 and b = 14. My variable a corresponds to finding the plus, and b corresponds to the first letter following the numbers.

My aim is to write a function to read in that string, and return "+ 1234", based on knowing a and b.

The only functions I know of with respect to strings are Mid, Len, Right/Left, and InStr, but none of them seem to read in a start and end point for substring finding. Right/Left would probably work, but I don't know how to cut the string from the right or the left using those.

Thanks guys.

Mid will work, try this.

Sub Test_Mid_Function
Dim a as integer
Dim b as integer
Dim Cut_String as String
a = 7
b = 14
Cut_String = Mid("abcde + 1234 abcde",a,b)
msgbox Cut_String
End Sub

Ah, mpeplow that was a good example! I changed it to

Cut_String = Mid("abcde + 1234 abcde",a,b-a)

Which works like a charm!