Specifies the name of the winpty shared library, used for the :terminal command. The default depends on whether Vim was built as a 32-bit or 64-bit executable. If not found, "winpty.dll" is tried as a fallback. Environment variables are expanded :set_env. This option cannot be set from a modeline or in the sandbox, for security reasons.

(default "winpty32.dll" or "winpty64.dll")

only available when compiled with the terminal feature on MS-Windows