visual indicator (a +-sign) to expand data in Listview (In MFC)

I want to implement a visual indicator (a + sign) to expand data in ListVi开发者_JS百科ew (In MFC). This ListView is part of TreeView control.

Like there is a + sign before Test, an Array type data, when I will click on the + sign it should expand.

Before

+Test

After

-
|Test[1]
|Test[2]
|Test[3]
|Test[4]
|Test[5]
|Test[6]
|Test[7]