You can invoke the built-in context menus of RadSpreasheet by right clicking on a cell, on heading row number or a column letter.
This will open a contextual menu which will allow you to hide or delete a row/column as well as cut, copy and paste sell content.
This demo shows how you can use the three types of ContextMenu that the control exposes, but in a custom manner. You can define your own items with a desirable
Text, but assign them a command from the built-in context menu. You can use the Value property of the RadMenuItem, in order to assign a preferable command.
Note the implementation of the CellContextMenu, where the Alert item's click event is manually handled trough the
CellContextMenuItemClicked client-side event of the control.