When I make a right click in a TMemo
component the system display a popup menu like this
but when I use a TSynEdit
component this popup menu is not shown, the question is exist any way to activate this system popup menu in a TSynEdit component or do I have to implement myself a right-click popup menu for the TSynEdit component to get right-click Cut,Copy,Paste,Delete functionality ?
The popup menu you're showing is added by Windows itself to Edit controls (TMemo is a wrapper around a multiline Edit control). Since SynEdit isn't based on the Windows Edit control, but is implemented fully itself, Windows doesn't provide that menu.
If SynEdit doesn't provide a popup menu itself, you'll have to implement your own.