How to convert a string into a conditional expression [on hold]

How to convert a string into a conditional expression [on hold]

Forgive me if this has already been asked, I looked and I couldn't find a
similar question anywhere. I need to convert a string that contains
conditional statements, sometimes nested inside one another into visual
basic code .
The following are examples of strings as they are stored in my db
1) If ([3] ='M' AND [4] ='S' AND [5]>=1000 : "OK"; "VIP")
2) If ([3] ='M' AND [4] ='S' AND [5]>=1000 : "OK") Else "VIP"
1) If ([3] = 'M' AND [4] = 'S' AND [5]>=1000 : 20/100 * [5]; 500)
2) If ([3] = 'M' AND [4] = 'S' AND [5]>=1000 : 20/100 * [5]) Else 500
1)If ([1] >=60 : 50; If ([1]>=50 : 40; If ([1]>=40 : 30; If([1]>=30 :
20;0))))
2) If ([1] >=60 : 50) Else If ([1]>=50 : 40) Else If ([1]>=40 : 30)
Else If ([1]>=30 : 20) Else 0
I know that using CodeDomProvider I can compile and run code in any .net
language , but before I do that, I need to have a string formatted in a
way the compiler can understand it, in other words I need that an input
string like this
If ([1] >=60 : 50; If ([1]>=50 : 40; If ([1]>=40 : 30; If([1]>=30 :
20;0))))
end up this way :
If ([1] >=60) Then
Return 50
Else If ([1]>=50)
Return 40
Else If ([1]>=40 )
Return 30
Else If([1]>=30 )
Return 20
Else
Return 0
End If
P.S. (1) and (2) are the same , being (2) just an alternative way of
recording the (1) expression The numbers inside square brackets are the
ID's of my variables
Any help would be appreciated. Thanks in advance!