Allow dialog controls to subscribe to installer events.

Add tests to verify split.

- Shift selected tab text up instead of down.

debugstr_wn.

class is isntalled instead of just relying on having it set the
InstallMe variable.

CertOpenSystemStoreA/W.

natural.

buffer size conversion from W to A (with help from Robert Shearman).

to TRUE.
Extension need to have 1 verb to mark the given progid to be
installed.

- Test that IEnum::Clone doesn't also do a Reset.

Add a VersionIndIndex for tracking version independent fields for the
ProgIds properly.

- Correct handling of Unicode strings & multibyte locales.
- More error checking.
- Change ERR to WARN.
- Match Windows quick & dirty estimate for GetSizeMax().

UISequence.

it.

registry diffs with native MSI.

InprocServer32. Also add install_on_demand boolean for future
expansion.