Need to know about the ABAP code

[J JAMMY]

Hi,

I need to create a project management feature allowing the user to create projects and objects in the same way as LSMW does. All customizing data will be linked to the corresponding project and object.
The project, sub project and Object will be stored in three different tables.

Can anyone give some coding logic to develop this.

[J JAMMY]

Ok..I want to create three fields in selection screen and where F4 values will be from three tables(Project,sub-project,Object).Means suppose I will choose project and sub-project the corresponding object should be populated automatically in Object field.
Can anyone tell this logic?