_msi: improve types (#9008)

Author: JelleZijlstra

stdlib/_msi.pyi

@@ -12,11 +12,11 @@ if sys.platform == "win32":
         # Don't exist at runtime
         __new__: None  # type: ignore[assignment]
         __init__: None  # type: ignore[assignment]
-    # Actual typename Summary, not exposed by the implementation
-    class _Summary:
-        def GetProperty(self, propid: int) -> str | bytes | None: ...
+    # Actual typename SummaryInformation, not exposed by the implementation
+    class _SummaryInformation:
+        def GetProperty(self, field: int) -> int | bytes | None: ...
         def GetPropertyCount(self) -> int: ...
-        def SetProperty(self, propid: int, value: str | bytes) -> None: ...
+        def SetProperty(self, field: int, value: int | str) -> None: ...
         def Persist(self) -> None: ...
         # Don't exist at runtime
         __new__: None  # type: ignore[assignment]
@@ -25,7 +25,7 @@ if sys.platform == "win32":
     class _Database:
         def OpenView(self, sql: str) -> _View: ...
         def Commit(self) -> None: ...
-        def GetSummaryInformation(self, updateCount: int) -> _Summary: ...
+        def GetSummaryInformation(self, updateCount: int) -> _SummaryInformation: ...
         def Close(self) -> None: ...
         # Don't exist at runtime
         __new__: None  # type: ignore[assignment]