Use the FilterBarDropDownHeight property to specify the height of the drop down window filter window. Use the DisplayFilterButton property to display a filter button to the column's header. By default, the FilterBarDropDownHeight property is 0.5. It means, the height of the drop down filter window is half of the height of the group's list.

If the FilterBarDropDownHeight property is negative, the absolute value of the FilterBarDropDownHeight property indicates the height of the drop down filter window in pixels. In this case, the height of the drop down filter window is not proportionally with the height of the group's list area. For instance, the following sample specifies the height of the drop down filter window being 100 pixels:

With Group
    .FilterBarDropDownHeight = -100
End With

If the FilterBarDropDownHeight property is greater than 0, it indicates the height of the drop down filter window proportionally with the height of the group's height list. For instance, the following sample specifies the height of the drop down filter window being the same with the height of the group's list area:

With Group
    .FilterBarDropDownHeight = 1
End With

The drop down filter window always include an item.