Demo

			
; Includes ---------------------------------
!include MUI2.nsh

; Settings ---------------------------------
Name "installer_name"
OutFile "installer_name.exe"
RequestExecutionLevel admin
InstallDir "$PROGRAMFILES\installer_name"

; Pages ------------------------------------
!insertmacro MUI_PAGE_COMPONENTS 
!insertmacro MUI_PAGE_DIRECTORY
!insertmacro MUI_PAGE_INSTFILES

; Languages --------------------------------
!insertmacro MUI_LANGUAGE "English"

; Sections ---------------------------------
Section "section" SECTION_INDEX

    MessageBox MB_OK "Hello World" 

SectionEnd

; Descriptions -----------------------------
LangString DESC_SECTION_INDEX ${LANG_ENGLISH} "section_description"

!insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
    !insertmacro MUI_DESCRIPTION_TEXT ${SECTION_INDEX} $(DESC_SECTION_INDEX)
!insertmacro MUI_FUNCTION_DESCRIPTION_END