Tree Control/Tree View Styles
The styles of the tree control are controlled by style flags. The user can modify the styles at run time.
Table 37 – Tree Control Style Flags 
Tree Control Style Flag
Description
TVS_DISABLEDRAGDROP
Prevents the tree view control from sending TVN_DRAGDROP notification messages.
TVS_EDITLABELS
Allows the user to edit the labels of tree view items.
TVS_HASBUTTONS
Displays plus (+) and minus (-) buttons next to parent items. The user clicks the buttons to expand or collapse a parent item's list of child items. To include buttons with items at the root of the tree view, you need to specify TVS_LINESATROOT.
TVS_HASLINES
Uses lines to show the hierarchy of items.
TVS_LINESATROOT
Uses lines to link items at the root of the tree view control. This value is ignored if TVS_HASLINES is not also specified.
TVS_SHOWSELALWAYS
Causes a selected item to remain selected when the tree view control loses focus.
TVXS_COLUMNHEADER
Displays the column header. This style removes the LVS_NOCOLUMNHEADER style so that all the columns display headers.
TVXS_FLYBYTOOLTIPS
Enable tooltips.
TVXS_MULTISEL
Enables the user to select multiple items.
TVXS_WORDWRAP
Enables word wrapping of text if the first column is narrow. Specifying this style automatically enables the LVXS_WORDWRAP style, affecting all columns.
LVS_SINGLESEL
Disables multiple selection of items.
LVXS_FITCOLUMNSONSIZE
The item column fills the width not occupied by subitem columns.
LVXS_FLYBYTOOLTIPS
Enable tooltips for additional columns. The TVXS_FLYBYTOOLTIPS style automatically enables this style.
LVXS_HILIGHTSUBITEMS
 
LVXS_LINESBETWEENCOLUMNS
Paints vertical lines between columns.
LVXS_LINESBETWEENITEMS
Paints horizontal lines between items.
LVXS_NOGROWCOLUMNONDELETE
Prevents automatic resizing of column 0 when a column is deleted.
LVS_NOCOLUMNHEADER
Specifies that additional columns do not display column headers. This style is automatically removed by specifying the TVXS_COLUMNHEADER style, which causes all columns to display headers.
LVXS_WORDWRAP
Enables word wrapping of item text if the column is narrow. The TVXS_WORDWRAP style automatically enables this style.
LVXS_OWNERDRAWVARIABLE
Reserved.
The following styles are not supported by SECTreeCtrl or SECTreeView:
*TVS_CHECKBOXES
*TVS_FULLROWSELECT (use LVXS_HILIGHTSUBITEMS)
*TVS_INFOTIP
*TVS_NONEVENHEIGHT
*TVS_NOSCROLL (use LVS_NOSCROLL)
*TVS_NOTOOLTIPS (use LVXS_FLYBYTOOLTIPS/TVXS_FLYBYTOOLTIPS)
*TVS_RTLREADING
*TVS_SINGLEEXPAND
*TVS_TRACKSELECT
The following figure illustrates some of the standard styles that the Objective Toolkit tree control shares with CTreeCtrl in addition to TVXS_FLYBYTOOLTIPS.
Figure 112 – Examples Tree Control Styles
The following figure illustrates some of the extended styles.
Figure 113 – Examples Tree Control Extended Styles