MUI_PAGE_WELCOME - how to change labels?

[green2000]

Hello!

How to change labels for text/title etc on welcome page?
My installer has two states: installer or actualizer. For each i must change labels for:
MUI_WELCOMEPAGE_TITLE
MUI_WELCOMEPAGE_TEXT
InstallButtonText

But when i use this code i got empty strings:

Var install_button_text
Var welcome_title
Var welcome_text
...
!define MUI_PAGE_CUSTOMFUNCTION_PRE WelcomePagePre
!define MUI_WELCOMEPAGE_TITLE '$welcome_title'
!define MUI_WELCOMEPAGE_TEXT '$welcome_text'
InstallButtonText $install_button_text
!insertmacro MUI_PAGE_WELCOME

...
Function WelcomePagePre
strcpy $install_mode '0' ; test value
${if} $install_mode == '0'
strcpy $install_button_text "Actualize"
strcpy $welcome_title "Welcome title for actualization"
strcpy $welcome_text "Welcome text for actualization"
${else}
strcpy $install_button_text "Install"
strcpy $welcome_title "Welcome title for installation"
strcpy $welcome_text "Welcome text for installation"
${endif}
MessageBox MB_OK "$welcome_title$\n$welcome_text"
FunctionEnd

How to change these labels?

[Red Wine]

Weird... this works as it's supposed to do:
EDIT: InstallButtonText should be replaced with MiscButtonText and must be initialized in function .onInit

code:
;NSIS Modern User Interface

;Basic Example Script

;Written by Joost Verburg



;--------------------------------

;Include Modern UI



  !include "MUI2.nsh"

  !include "logiclib.nsh"



Var install_button_text

Var welcome_title

Var welcome_text

var install_mode



;--------------------------------

;General



  ;Name and file

  Name "Modern UI Test"

  OutFile "Basic.exe"



  ;Default installation folder

  InstallDir "$LOCALAPPDATA\Modern UI Test"

  

  ;Get installation folder from registry if available

  InstallDirRegKey HKCU "Software\Modern UI Test" ""



  ;Request application privileges for Windows Vista

  RequestExecutionLevel user

  InstallButtonText $install_button_text

;--------------------------------

;Interface Settings



  !define MUI_ABORTWARNING



;--------------------------------

;Pages



  !define MUI_PAGE_CUSTOMFUNCTION_PRE WelcomePagePre

  !define MUI_WELCOMEPAGE_TITLE '$welcome_title'

  !define MUI_WELCOMEPAGE_TEXT '$welcome_text'

  !insertmacro MUI_PAGE_WELCOME



  !insertmacro MUI_PAGE_LICENSE "${NSISDIR}\Docs\Modern UI\License.txt"

  !insertmacro MUI_PAGE_COMPONENTS

  !insertmacro MUI_PAGE_DIRECTORY

  !insertmacro MUI_PAGE_INSTFILES

  

  !insertmacro MUI_UNPAGE_CONFIRM

  !insertmacro MUI_UNPAGE_INSTFILES

  

;--------------------------------

;Languages

 

  !insertmacro MUI_LANGUAGE "English"



;--------------------------------

;Installer Sections



Section "Dummy Section" SecDummy



  SetOutPath "$INSTDIR"

  

  ;ADD YOUR OWN FILES HERE...

  

  ;Store installation folder

  WriteRegStr HKCU "Software\Modern UI Test" "" $INSTDIR

  

  ;Create uninstaller

  WriteUninstaller "$INSTDIR\Uninstall.exe"



SectionEnd



;--------------------------------

;Descriptions



  ;Language strings

  LangString DESC_SecDummy ${LANG_ENGLISH} "A test section."



  ;Assign language strings to sections

  !insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN

    !insertmacro MUI_DESCRIPTION_TEXT ${SecDummy} $(DESC_SecDummy)

  !insertmacro MUI_FUNCTION_DESCRIPTION_END



;--------------------------------

;Uninstaller Section



Section "Uninstall"



  ;ADD YOUR OWN FILES HERE...



  Delete "$INSTDIR\Uninstall.exe"



  RMDir "$INSTDIR"



  DeleteRegKey /ifempty HKCU "Software\Modern UI Test"



SectionEnd





Function WelcomePagePre

strcpy $install_mode '0' ; test value

${if} $install_mode == '0'

strcpy $install_button_text "Actualize"

strcpy $welcome_title "Welcome title for actualization"

strcpy $welcome_text "Welcome text for actualization"

${else}

strcpy $install_button_text "Install"

strcpy $welcome_title "Welcome title for installation"

strcpy $welcome_text "Welcome text for installation"

${endif}

MessageBox MB_OK "$welcome_title$\n$welcome_text"

FunctionEnd

[green2000]

Great Thanks Red Wine

[green2000]

Hmmm....
I use UltraModernUI - how to improve my code for this UI? It's still beta, but my Boss doesn't like MUI :/