Extracting numeric values in another application?

I want to create an application that will read the values of six stats from a game and then click the reroll button if the stats are too low to be acceptable.
How do I go about detecting these values and sending a click event to the reroll button?
Is the only way to do this to decompile the game?
An example of what I want is this:
Lets say I click the reroll button, and these stats appear:
Strength: 15
Constitution: 16
Agility: 4
Dexterity: 19
Intelligence: 16
Wisdom: 17
Now I want my application to read these values and compare them to the minimum values I have set to be acceptable stats. Lets say the minimum is 15 in each category. This would mean that Agility is too low, so my application would then send a click event to the Reroll button and read the stats again and so on..
Any help is appreciated, thanks.