import ctypes
import sys
from typing_extensions import Literal, TypeAlias

if sys.platform == "win32":
    win32con_WM_COPYDATA: int
    def can_talk_to_agent() -> bool: ...

    ULONG_PTR: TypeAlias = ctypes.c_uint64 | ctypes.c_uint32

    class COPYDATASTRUCT(ctypes.Structure): ...

    class PageantConnection:
        def __init__(self) -> None: ...
        def send(self, data: bytes) -> None: ...
        def recv(self, n: int) -> Literal[""] | bytes: ...
        def close(self) -> None: ...