Are there any Dropdown controls with checkboxes in them?

I've seen some for web using javascript, but I am lookin开发者_开发知识库g for a Windows Form control that is a ComboBox that when opened displays a list of checkboxes and labels, allowing to select one or more, with a "Select All" option.

Would like a non-commercial solution.

I hate to suggest a commercial solution, however, I am using the DevExpress Winforms suite and it has exactly what you are looking for. Plus it really let's you really customize it (as you see in the example below).

why can't you build your own checked comboBox by integrating a label, button and a checked listbox?