next-selection-coding-system

next-selection-coding-system is a variable defined in `select.el'.
Its value is

nil

Documentation:
Coding system for the next communication with other programs.
Usually, `selection-coding-system' is used for communicating with
other programs (X Windows clients or MS Windows programs). But, if this
variable is set, it is used for the next communication only.
After the communication, this variable is set to nil.