Looping Text Search

I have searched all over and I couldn't find what I am looking for so any help is greatly appreciated.

I have an INI file with certain strings that have an integer value that increments:
eg.
string_1
string_2
... etc.

and I need to find what out what the maximum number is. And then I have to add a string using what the next number would be (ie. max num found +1). (Please note the strings are not necessarily in increasing order)

Thank you for your help,

Jamie

Can you attach some examples of the way (or ways) your INI file might be formatted?

There are a bunch of sections, and then there is a particular section where the modifcations need to take place.

Consider the example below of 'Widgets':

.... *bunch of stuff not applicable* ...

[Widgets]
bluewidget=_1_0_0
special_bluewidget={'bluewidget'}
widgets_42=bluewidget
yellowwidget=_2_3_0
special_yellowwidget={'yellowwidget'}
widgets_41=yellowwidget
... etc.

Where the 42, and 41 are, is what I am referring to. I need to find the max number. But these 'widgets' aren't in any particular order.

I hope that helps you help me.

Fixed

I fixed that problem (by counting the number of times widgets_ was found )

Thanks for your help.