import ctypes
import sys

if sys.platform == "win32":
    win32con_WM_COPYDATA: int
    def can_talk_to_agent(): ...
    class COPYDATASTRUCT(ctypes.Structure): ...
    class PageantConnection:
        def __init__(self) -> None: ...
        def send(self, data: bytes) -> None: ...
        def recv(self, n: int) -> bytes: ...
        def close(self) -> None: ...