`ICERR_*` constants should be typed as `LRESULT`

From the [`ICClose` function documentation](https://learn.microsoft.com/en-us/windows/win32/api/vfw/nf-vfw-icclose) it appears that constants such as `ICERR_OK` are expected to be typed as `LRESULT`.
In the metadata today, these `ICERR_*` constants are typed as `int`.

Start with the ICClose documentation linked in the issue, then locate the metadata entries for the ICERR_* constants. Verify the documented LRESULT type against the current int declarations and run the repository's relevant metadata validation or generation checks. The issue names no source file or test.

Written by the indexing model from the issue text.