better than instr method

I'm using instr to find x and ys in a string. For instance,


if instr(strString,"(4,3)") > 0 then
msgbox "its herE"
end if

Only I'm doing this with many values and its slow. Is there a faster method? If so please demonstrate
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JPERKS1985Asked:
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igor_alphaCommented:
Hi, JPERKS1985
Otherr methods in .net such as instr is a:
1. String.IndexOf
if strString.IndexOf("(4,3)") > 0 then
msgbox "its herE"
end if

and
2. String.Contains
if strString.Contains("(4,3)") then
msgbox "its herE"
end if

Also following opinion exists:
Instr is faster than indexOf when it is about strings.
Instr is slower than indexOf when it is about characters.
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