Want Insert Sub Form in form

Dear Admin/Experts,

I have work for school fees module and stuck in Sub form stage, Pls help me.

Code is as under :

[#Part: MST LED Explode CurrentAssets]
Add : Line : At End : AcademicDetails,FamilyDetails,

[Line : AcademicDetails]
Field : Long Prompt, ItemRateSetings
Local : Field : Long Prompt : Set As : "Set/Alter Student Academic Details :"

[Field : ItemRateSetings]
use : Logical Field
Set aS : No
Sub Forms : Academic Details : $$Value

[Report : Academic Details]
Form :Academic Details

[Form :Academic Details]
Part :ItemRateSF

[Part :ItemRateSF]
Line : ItemRateSF
Scroll : Vertical

[Line :ItemRateSF]
Field : MSTSFItemName,;MSTSFItemRate
[Field : MSTSFItemName]
use : Logical Field
Set as : No
Sub Forms : Details : $$Value
Width : 90% Screen
[Form etails]
Part etails
[Part etails]
Lines : Class1, ;;Class2, Class3, Class4
Scroll : Vertical

[Line :Class1]

Field : DetailsH, Details

[Field : DetailsH]
Use : Name Field
Set As : "Set/Alter Class 1 Detail's :"
Align : Left

[Field : Details]
Use :Name Field
Set as :"Mani"

 

Sir,
I want insert two fields
1. Set alter student academic details for maintain students academic details along with his class wise Quarterly, Half Yearly And Yearly Subject marks detail's. (For Class 1st to 12th )

2. Set Students family details for Maintain Students Family history along with Mother father details , Date of Birth,Contact Details & so on....

that's why i want wand sub form in a form (like Group Tree Dreal down in tally Group>sub Group>parent Group of sub Group Etc.)

and if you suggest any better way pls tell.

Thanks in advance.

Mahesh