Drop down box C # can be modified
no vote
Drop down box C # can modify the drop-down box of C # combobox does not support drop-down check box list, drop-down tree list, etc. the third-party components are used in the system, and now the third-party components need to be replaced. Basic idea: Rewrite combobox, mask the original pull-down part, use toolstripdropdown to make pull-down pop-up, and use MouseDown, mouseleave, and MouseMove events to coordinate with the position of cusor to realize mouse dragging to change the component size