Check for a Registry Key - Revision history

84.108.238.52: added simpler logiclib version

2009-11-24T18:05:39Z

added simpler logiclib version

@@ Line 17: / Line 17: @@
 ;$R0 contains 0 (not present) or 1 (present)
 </highlight-nsis>
 == The Macro ==

Kichik: that doesn't work if the key contains no values

2007-08-03T10:17:18Z

that doesn't work if the key contains no values

â† Older revision		Revision as of 10:17, 3 August 2007
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	{{PageAuthor\|Vytautas}}		{{PageAuthor\|Vytautas}}

	~~= Method 1 =~~

	~~The error flag is set if one uses '''EnumRegValue $R0 HKCU My\Reg\Path 0''' and the key does not exist.~~

	~~= Method 2 =~~

	== Description ==		== Description ==

Afrow UK at 09:51, 3 August 2007

2007-08-03T09:51:46Z

â† Older revision		Revision as of 09:51, 3 August 2007
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	{{PageAuthor\|Vytautas}}		{{PageAuthor\|Vytautas}}

			= Method 1 =

			The error flag is set if one uses '''EnumRegValue $R0 HKCU My\Reg\Path 0''' and the key does not exist.

			= Method 2 =

	== Description ==		== Description ==

Joost: removed incorrect note

2006-09-17T21:31:25Z

removed incorrect note

â† Older revision		Revision as of 21:31, 17 September 2006
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	== Description ==		== Description ==
	Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.		Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.

	~~'''Note:''' You can also check the error flag after reading the default value of the registry key to know whether the key exits, that is easier in most situations.~~

	'''[UPDATE: 2004-04-07]'''		'''[UPDATE: 2004-04-07]'''

Vytautas: /* Description */

2005-07-15T04:26:15Z

Description

â† Older revision		Revision as of 04:26, 15 July 2005
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	'''Note:''' You can also check the error flag after reading the default value of the registry key to know whether the key exits, that is easier in most situations.		'''Note:''' You can also check the error flag after reading the default value of the registry key to know whether the key exits, that is easier in most situations.

	; [UPDATE: 2004-04-07]		'''[UPDATE: 2004-04-07]'''
	: Fixed another typo.		: Fixed another typo.
	; [UPDATE: 2003-11-14]		'''[UPDATE: 2003-11-14]'''
	: Fixed a typo in latest version.		: Fixed a typo in latest version.
	; [UPDATE: 2003-11-12]		'''[UPDATE: 2003-11-12]'''
	: Added Indexed labels to the macro to enable easier modification if needed.		: Added Indexed labels to the macro to enable easier modification if needed.

ConversionBot: Adding new author and category links.

2005-06-24T11:55:03Z

Adding new author and category links.

â† Older revision		Revision as of 11:55, 24 June 2005
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	{~~\|align=right~~		{{PageAuthor\|Vytautas}}
	~~\|<small>Author: [[~~{~~{ns:2}}:Vytautas~~\|Vytautas~~]] ([[{{ns:3}}:Vytautas\|talk]], [[{{ns:-1}~~}~~:Contributions/Vytautas\|contrib]])</small>~~
	\|}
	~~<br style="clear:both;">~~
	== Description ==		== Description ==
	Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.		Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.
Line 60:		Line 58:
	Vytautas		Vytautas

	[[~~{{ns:14}}~~:INI, CSV & Registry Functions]]		[[Category:INI, CSV & Registry Functions]]

ConversionBot: Added category links.

2005-04-30T21:34:36Z

Added category links.

â† Older revision		Revision as of 21:34, 30 April 2005
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	Vytautas		Vytautas

			[[{{ns:14}}:INI, CSV & Registry Functions]]

ConversionBot: Updated author links.

2005-04-29T23:14:50Z

Updated author links.

@@ Line 1: / Line 1: @@
 == Description ==
 Include this macro to check to see if a specified registry key exists.  After using this macro the stack contains 0 if the key was not present and 1 if it was.
@@ Line 55: / Line 59: @@
 Vytautas

ConversionBot: Updated author and download links, and changed format of some pages.

2005-04-23T12:38:37Z

Updated author and download links, and changed format of some pages.

â† Older revision		Revision as of 12:38, 23 April 2005
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	Vytautas		Vytautas

	Page author: Vytautas		Page author: [[User:Vytautas\|Vytautas]]

ConversionBot: Wikipedia python library

2005-04-09T20:14:19Z

Wikipedia python library

New page

== Description ==
Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.

'''Note:''' You can also check the error flag after reading the default value of the registry key to know whether the key exits, that is easier in most situations.

; [UPDATE: 2004-04-07]
: Fixed another typo.
; [UPDATE: 2003-11-14]
: Fixed a typo in latest version.
; [UPDATE: 2003-11-12]
: Added Indexed labels to the macro to enable easier modification if needed.

== Usage ==
<highlight-nsis>
!insertmacro IfKeyExists "ROOT" "KeyToCheckIn" "KeyToCheck"
Pop $R0
;$R0 contains 0 (not present) or 1 (present)
</highlight-nsis>

== The Macro ==
<highlight-nsis>!macro IfKeyExists ROOT MAIN_KEY KEY
push $R0
push $R1

!define Index 'Line${__LINE__}'

StrCpy $R1 "0"

"${Index}-Loop:"
; Check for Key
EnumRegKey $R0 ${ROOT} "${MAIN_KEY}" "$R1"
StrCmp $R0 "" "${Index}-False"
IntOp $R1 $R1 + 1
StrCmp $R0 "${KEY}" "${Index}-True" "${Index}-Loop"

"${Index}-True:"
;Return 1 if found
push "1"
goto "${Index}-End"

"${Index}-False:"
;Return 0 if not found
push "0"
goto "${Index}-End"

"${Index}-End:"
!undef Index
exch 2
pop $R0
pop $R1
!macroend</highlight-nsis>

This page was created due to [http://forums.winamp.com/showthread.php?s=&threadid=143600 this thread.]

Vytautas

Page author: Vytautas