Header and footer dropdown buttons and header and footer filter buttons are optional components shown as part of column headers and footers. They can be enabled using the SFTTREE_COLUMN_EX structure members styleTitle and styleFooterTitle.
The images cannot be customized.
These buttons are only visible when the user's mouse cursor is located over the header or footer.
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| Dropdown Button | Filter Button |
When the button is clicked the SFTTREEN_LBUTTONDOWN_COLUMN_HEADERDD or SFTTREEN_LBUTTONDOWN_COLUMN_HEADERDD notifications can be handled by the application to implement custom behavior. A popup menu or dialog could be displayed. The ContextMenu sample demonstrates how to implement a menu.
Additional events may occur depending on which mouse button is clicked or double clicked:
On
Off