This method sets the command prompt.
HRESULT put_CommandPrompt( BSTR bstrCommandPrompt );
NOERROR indicates success. E_OUTOFMEMORY indicates that the system is out of memory.
To create command prompts than span multiple lines, set the item height to a size large enough to accommodate all needed lines. Then set bstrCommandPrompt to the desired value, using newline characters to separate the lines.
IASPowerListBox::put_ItemHeight