indexing
	description: "Objects that allow the user to know about Windows versions"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-03-22 23:29:03 -0800 (Wed, 22 Mar 2006) $"
	revision: "$Revision: 57641 $"

class interface
	WEL_WINDOWS_VERSION

create 
	default_create
			-- Process instances of classes with no creation clause.
			-- (Default: do nothing.)
			-- (from ANY)

feature -- Access

	generating_type: STRING_8
			-- Name of current object's generating type
			-- (type of which it is a direct instance)
			-- (from ANY)

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)
	
feature -- Comparison

	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			shallow_implies_deep: standard_equal (some, other) implies Result
			both_or_none_void: (some = Void) implies (Result = (other = Void))
			same_type: (Result and (some /= Void)) implies some.same_type (other)
			symmetric: Result implies deep_equal (other, some)

	frozen equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

	is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object considered
			-- equal to current object?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			symmetric: Result implies other.is_equal (Current)
			consistent: standard_is_equal (other) implies Result

	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached to
			-- field-by-field identical objects of the same type?
			-- Always uses default object comparison criterion.
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

	frozen standard_is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object of the same type
			-- as current object, and field-by-field identical to it?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			same_type: Result implies same_type (other)
			symmetric: Result implies other.standard_is_equal (Current)
	
feature -- Status report

	conforms_to (other: ANY): BOOLEAN
			-- Does type of current object conform to type
			-- of `other' (as per Eiffel: The Language, chapter 13)?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of `other'?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))
	
feature -- Duplication

	copy (other: like Current)
			-- Update current object using fields of object attached
			-- to `other', so as to yield equal objects.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_equal: is_equal (other)

	frozen deep_copy (other: like Current)
			-- Effect equivalent to that of:
			--		copy (`other' . deep_twin)
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			deep_equal: deep_equal (Current, other)

	frozen deep_twin: like Current
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: like Current)
			-- Copy every field of `other' onto corresponding field
			-- of current object.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_standard_equal: standard_is_equal (other)

	frozen standard_twin: like Current
			-- New object field-by-field identical to `other'.
			-- Always uses default copying semantics.
			-- (from ANY)
		ensure -- from ANY
			standard_twin_not_void: Result /= Void
			equal: standard_equal (Result, Current)

	frozen twin: like Current
			-- New object equal to `Current'
			-- twin calls copy; to change copying/twining semantics, redefine copy.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result.is_equal (Current)
	
feature -- Basic operations

	frozen default: like Current
			-- Default value of object's type
			-- (from ANY)

	frozen default_pointer: POINTER
			-- Default value of type `POINTER'
			-- (Avoid the need to write `p'.default for
			-- some `p' of type `POINTER'.)
			-- (from ANY)

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)
	
feature -- "Shell and Common controls" Versions

	comctl32_version: INTEGER_32
			-- Version of Comctl32.dll

	shell32_version: INTEGER_32
			-- Version of Shell32.dll

	shlwapi_version: INTEGER_32
			-- Version of Shlwapi.dll
	
feature -- Compatible Windows Versions

	is_windows_2000_compatible: BOOLEAN
			-- Is the current program running under Windows 2000 or above?

	is_windows_98_compatible: BOOLEAN
			-- Is the current program running under Windows 98 or above?

	is_windows_9x: BOOLEAN
			-- Is the current program running under Windows 9x
			-- (Windows 95, Windows 98, Windows Me, ...)?

	is_windows_me_compatible: BOOLEAN
			-- Is the current program running under Windows Me or above?

	is_windows_nt: BOOLEAN
			-- Is the current program running under a version of
			-- windows belonging to the NT family?
			-- (Windows NT 3.51, Windows NT4, Windows 2000,
			-- Windows XP Home/Professional)

	is_windows_nt4_compatible: BOOLEAN
			-- Is the current program running under Windows NT4 or above?

	is_windows_xp_compatible: BOOLEAN
			-- Is the current program running under Windows XP or above?
	
feature -- Current Windows Version

	build_number: INTEGER_32
			-- Build number of current operating system
		require
			windows_nt_family: is_windows_nt

	major_version: INTEGER_32
			-- Major version of current operating system

	minor_version: INTEGER_32
			-- Minor version of current operating system
	
feature -- Exact Windows Versions

	is_windows_2000: BOOLEAN
			-- Is the current program running under Windows 2000?
		ensure
			windows2000_is_nt: Result implies is_windows_nt

	is_windows_95: BOOLEAN
			-- Is the current program running under Windows 95
			-- (OSR1, OSR2 or OSR2.5)?
		ensure
			windows95_is_9x: Result implies is_windows_9x

	is_windows_98: BOOLEAN
			-- Is the current program running under Windows 98
			-- (1st or 2nd edition)?
		ensure
			windows98_is_9x: Result implies is_windows_9x

	is_windows_me: BOOLEAN
			-- Is the current program running under Windows Millenium Edition?
		ensure
			windows_me_is_9x: Result implies is_windows_9x

	is_windows_nt4: BOOLEAN
			-- Is the current program running under Windows NT4?
		ensure
			windows_nt4_is_nt: Result implies is_windows_nt

	is_windows_xp: BOOLEAN
			-- Is the current program running under Windows XP (Home or Professional)?
		ensure
			windows_xp_is_nt: Result implies is_windows_nt
	
feature -- Output

	io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of tagged_out.
			-- (from ANY)

	print (some: ANY)
			-- Write terse external representation of `some'
			-- on standard output.
			-- (from ANY)

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of out.
			-- (from ANY)
	
feature -- Platform

	operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
	
feature -- Version Constants

	version_400: INTEGER_32 is 262144
			-- version_400 <=> Microsoft Windows 95/Windows NT 4.0

	version_470: INTEGER_32 is 262214
			-- version_470 <=> Microsoft Internet Explorer 3.x

	version_471: INTEGER_32 is 262215
			-- version_471 <=> Microsoft Internet Explorer 4.0

	version_472: INTEGER_32 is 262216
			-- version_472 <=> Microsoft Internet Explorer 4.01 & Windows 98

	version_500: INTEGER_32 is 327680
			-- version_500 (Shlwapi.dll) <=> Microsoft Internet Explorer 5
			-- version_500 (Shell32.dll) <=> Microsoft Windows 2000

	version_580: INTEGER_32 is 327760
			-- version_580 (Comctl32.dll) <=> Microsoft Internet Explorer 5

	version_581: INTEGER_32 is 327761
			-- version_581 (Comctl32.dll)<=> Microsoft Windows 2000

	version_600: INTEGER_32 is 393216
			-- version_600 (Comctl32.dll)<=> Microsoft Windows XP
	
feature -- Windows Versions (output)

	version_number_string: STRING_8
			-- String representing the version number using the following format
			--   <major_version>.<minor_version>.<build_number> for Windows NT, 2000, XP
			--   <major_version>.<minor_version> for Windows 95, 98, Me
	
invariant
		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

indexing
	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		356 Storke Road, Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class WEL_WINDOWS_VERSION