added release notes check box to the finish page

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4710 212acab6-be3b-0410-9dea-997c60f758d6

Examples/makensis.nsi

@@ -28,6 +28,7 @@ InstallDirRegKey HKLM Software\NSIS ""
 
 !include "MUI.nsh"
 !include "Sections.nsh"
+!include "LogicLib.nsh"
 
 ;--------------------------------
 ;Definitions
@@ -69,6 +70,10 @@ Page custom PageReinstall PageLeaveReinstall
 !define MUI_FINISHPAGE_RUN "$INSTDIR\NSIS.exe"
 !define MUI_FINISHPAGE_NOREBOOTSUPPORT
 
+!define MUI_FINISHPAGE_SHOWREADME
+!define MUI_FINISHPAGE_SHOWREADME_TEXT "Show release notes"
+!define MUI_FINISHPAGE_SHOWREADME_FUNCTION ShowReleaseNotes
+
 !insertmacro MUI_PAGE_FINISH
 
 !insertmacro MUI_UNPAGE_CONFIRM
@@ -946,6 +951,20 @@ Function AddReadmeToStartMenu
 FunctionEnd
 !endif
 
+Function ShowReleaseNotes
+  ${If} ${FileExists} $WINDIR\hh.exe
+    StrCpy $0 $WINDIR\hh.exe
+    Exec '"$0" mk:@MSITStore:$INSTDIR\NSIS.chm::/SectionF.1.html'
+  ${Else}
+    SearchPath $0 hh.exe
+    ${If} ${FileExists} $0
+      Exec '"$0" mk:@MSITStore:$INSTDIR\NSIS.chm::/SectionF.1.html'
+    ${Else}
+      ExecShell "open" "http://nsis.sourceforge.net/Docs/AppendixF.html#F.1"
+    ${EndIf}
+  ${EndIf}
+FunctionEnd
+
 ;--------------------------------
 ;Uninstaller Section