X++ Need Idea : How can i made user's input (int) & use it in field From & field To

Hi experts,

Hi experts,

I'm new to AX 2012 R3 CU9, i'm also new to programming. Please guide me, i need to create Field From and Field To. The scenario is for user to input range of numbers, example :

Field From : 0020 (user's input)

Field To : 0030 (user's input)

These range of numbers will be used as ID on another form. And it will stop in 0030. Now my question is, how can i achieve this? Should i make these field as sequence number? Or any different idea? Thanks.