Implemented ExtractIconEx; moved SHMapPIDLToSystemImageListIndex,
Shell_GetImageList in this file.

instead of using linked list hack.

messages.
Added all languages and sublanguages for languages supported in
resources/sysres_Xx.

object on failure.

names in the GetClassInfo functions.

Do not call built-in USER signal handler when using native USER.

InterlockedCompareExchange().

Return bitmasks for hi/truecolor depths in EnumDisplayModes.

just once at creation time.

more straightforward than comparing message queues, it also works
better for Win32 applications.

X returns a char for it, but Windows doesn't. Ignore X char.
Also added some documentation.

family support.

lookup (Registry is case insensitive).

StartServiceCtrlDispatcher32A/W, RtlSystemTimeToLocalTime,
RtlTimeToTimeFields.

to be in nominative case.

an invalid size parameter.

of positions indexes, suppressed warnings.