+ Sets the data of an item.
+
+ wxListItem is a class with the following members
+
+ - long m_mask: Indicates which fields are valid. See below.
+ - long m_itemId: Zero based item position.
+ - int m_col: Zero based column index.
+ - long m_state: The state of the item: See below for valid state flags.
+ - long m_stateMask: A mask indicating which state flags are valid. See below.
+ - wxStrign m_text: the label (or header for columns)
+ - int m_image: The zero based index into an image list
+ - long m_data: Application defined data
+ - int m_format: For columns only: Either of wxLIST_FORMAT_LEFT, wxLIST_FORMAT_RIGHT, wxLIST_FORMAT_CENTRE
+ - int m_width: For columns only: the width of the column
+
+ The @b m_mask member contains a bitlist specifying which of the other fields
+ are valid. The flags are:
+ - wxLIST_MASK_STATE: The m_state field is valid.
+ - wxLIST_MASK_TEXT: The m_text field is valid.
+ - wxLIST_MASK_IMAGE: The m_image field is valid.
+ - wxLIST_MASK_DATA: The m_data field is valid.
+ - wxLIST_MASK_WIDTH: The m_width field is valid.
+ - wxLIST_MASK_FORMAT: The m_format field is valid.
+
+ The @b m_stateMask and @b m_state members take flags from the following:
+
+ - wxLIST_STATE_DONTCARE: Don't care what the state is. Win32 only.
+ - wxLIST_STATE_DROPHILITED: The item is highlighted to receive a drop event. Win32 only.
+ - wxLIST_STATE_FOCUSED: The item has the focus.
+ - wxLIST_STATE_SELECTED: The item is selected.
+ - wxLIST_STATE_CUT: The item is in the cut state. Win32 only.
+
+ The wxListItem object can also contain item-specific colour and font
+ information: for this you need to call one of SetTextColour(),
+ SetBackgroundColour() or SetFont() functions on it passing it the colour/font
+ to use. If the colour/font is not specified, the default list control
+ colour/font is used.