I want to create condition box with validation

[Packs]

I want to create condition box with validation.

I have used synedit for creating condition box . it is highlighting and it is working properly .

I want to validate syntax like user is writing conditions.

example : if ( x > 0 ) then
                   goto abc
               else
                   goto pqr

it should validate brackets and or operator .

how I can do it