constants FilterListEnum
The FilterListEnum type specifies the type of items being included in the column's drop down list filter. The FilterList property specifies the items being included to the column's drop down filter-list, including other options for filtering. Use the DisplayFilterPattern and/or DisplayFilterDate property to display the pattern field, a date pattern or a calendar control inside the drop down filter window. 

The FilterList can be a bit-combination of exAllItems, exVisibleItems or exNoItems with any other flags being described bellow:

NameValueDescription
exAllItems0 The filter's list includes all items in the column. 
exVisibleItems1 The filter's list includes only visible (filtered) items from the column. The visible items include child items of collapsed items.
exNoItems2 The filter's list does not include any item from the column. Use this option if the drop down filter displays a calendar control for instance.
exLeafItems3 The filter's list includes the leaf items only. A leaf item is an item with no child items.
exRootItems4 The filter's list includes the root items only.
exSortItemsDesc16 If the exSortItemsDesc flag is set the values in the drop down filter's list gets listed descending. If none of the exSortItemsAsc or exSortItemsDesc is present, the list is built as the items are displayed in the control.
exSortItemsAsc32 If the exSortItemsAsc flag is set the values in the drop down filter's list gets listed ascending. If none of the exSortItemsAsc or exSortItemsDesc is present, the list is built as the items are displayed in the control.
exIncludeInnerCells64 The exIncludeInnerCells flag specifies whether the inner cells values are included in the drop down filter's list. The SplitCell method adds an inner cell, on in other words splits a cell. 
exSingleSel128 If this flag is present, the filter's list supports single selection. By default, (If missing), the user can select multiple items using the CTRL key. Use the exSingleSel property to prevent multiple items selection in the drop down filter list.
exShowCheckBox256 The filter's list displays a check box for each included item. Clicking the checkbox, makes the item to be include din the filter. If this flag is present, the filter is closed once the user presses ENTER or clicks outside of the drop down filter window. By default, ( this flag is missing ), clicking an item closes the drop down filter, if the CTRL key is not pressed. This flag can be combined with exHideCheckSelect.

The following screen shot shows the drop down filter with or with no exShowCheckBox flag:

or

exHideCheckSelect512 The selection background is not shown for checked items in the filter's list. This flag can be combined with exShowCheckBox.

The following screen shot shows no selection background for the checked items: 

exShowFocusItem1024 This flag allows highlighting the focus cell value in the filter's list. The focus cell value is the cell's content at the moment the drop down filter window is shown. For instance, click an item so a new item is selected, and click the drop down filter button. A item being focused in the drop down filter list is the one you have in the control's selection. This flag has effect also, if displaying a calendar control in the drop down filter list.

The following screen shot shows the focused item in the filter's list ( The Integration ... item in the background is the focused item, and the same is in the filter's list ) :

exShowPrevSelectOpaque2048 By default, the previously selection in the drop down filter's list is shown using a semi-transparent color. Use this flag to show the previously selection using an opaque color. The exSelFilterForeColor and exSelFilterBackColor options defines the filter's list selection foreground and background colors.
exEnableToolTip4096 This flag indicates whether the filter's tooltip is shown. The Description(exFilterBarTooltip,exFilterBarPatternTooltip, ...) properties defines the filter's tooltips.
exShowExclude8192 This flag indicates whether the Exclude option is shown in the drop down filter window. This option has effect also if the drop down filter window shows a calendar control. The exFilterExclude flag excludes programmatically the selected items in the drop down filter panel.

The following screen shot shows the Exclude field in the drop down filter window:

exShowBlanks16384 This flag indicates whether the (Blanks) and (NonBlanks) items are shown in the filter's list