How to find child controls of another control(parent control)

Question

Hello Friends,

I have a combobox in which diffrerent controls name are present like panel1,button1,groupbox1 ect.

now i want to make panel1 which has a string type(Because it's a element of combobox) as a control panel1
so that i can find child controls of panel 1.

If You have a solution for tihs please send replay ASAP.

Thanks