MQL4 help - how to create a Data set?

 

Hi,

I am new to using MQL4 and wondered if anyone can help me with a function that I may have missed.

I need to store a string of data with a integer (counter) and thus call this in the future. eg:
I need to store the string "1234" in a existing data set , and if 1234 already exists then the integer will increase (i.e from 1 to 2 if the value was 1)

I also need the ability to call the data set and search for the specific string

 Any Help would be greatly appreciated 

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