How do get selected item list properties in combobox

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C++

MFC

In combobox i have properties window
trial properties
If i select properties window in combobox,it has to display that particular properties like appearance
parameters which belongs to properties window

Here sub items are appearance,parameters for properties window


On selection of trial properties,has to display parameters
Range


Here sub items are parameters,Range for Trial properties
please help how to do this

thanks in advance