`the trait bound PWSTR: CanInto<PCWSTR> is not satisfied`

[wuweiran]

Summary

Windows APIs often expect PCWSTR parameters for read-only input.
By allowing PWSTR to be converted into PCWSTR, Rust code can seamlessly interact with Windows APIs without explicit conversions.

Crate manifest

No response

Crate code

let file_path = item.GetDisplayName(SIGDN_FILESYSPATH)?;
MessageBoxW(None, file_path, w!("File Path"), MB_OK);

[kennykerr]

Seems reasonable. I've added support for this here: #2899