PB12 - How to work with combobox/dropdown/panel(combobox)

Hi,
I have read alot of sites but didnt found any solution :/ how to solve these problems:

Problem number 1(attachemnts with "p1"):

I have a object ComboBox("rodzaj") that have properties like wItem,wItemCount,wSelectedItem but still its not posibble to select any item from the list. If i read wSelectedItem property it always giving "-1" in ouput even if i change selected item.

Refresh() not helps - looks like TC "remember" selected as default value.

ComboBox=ParentWindow.ComboBox("rodzaj")
ComboBox.Refresh()
Log.Message(ComboBox.wSelectedItem)#Always "-1"

 If i try:

    Log.Message(ComboBox.wItem(1))

I get that error:

TypeError 'IDispatchIndexedPropertyWrapper' object is not callable

Problem nr 2(attachemnts with "p2"):

In this case our "combobox" is a panel and I have no clue how to choose a specific value from it.

Problem nr 3(attachemnts with "p3"):

In this case we have to work with dropdown object, I have no clue how to choose a specific value from it.

Actually in every case I am using "down" keys but as we know its weak solution.

I already seen that: https://support.smartbear.com/viewarticle/72444/

I would be very grateful for your help