Need some guidelines about designing a form with more controls.

Question

Hi all,

I am having a windows application developed using vb.net. It contains the 12 group boxes under 5 tabs in a single form, and each group box is having minimum of 5 controls.

Control values present in the one group box is depending on the other group box's control value.

While writing code for the above application I am finding many difficulties.

It doesn't have readability, maintainability and so on. I am not feeling that my code is good and I can easily fix any problem.

Can someone please provide me some good design principle for designing the windows forms.

Thanks in Advance.