NSIS：实现多语言安装卸载并定义语言相关字符串

!define PRODUCT_NAME ""
!define PRODUCT_VERSION "1.0"
!define PRODUCT_PUBLISHER "My company, Inc."
!define PRODUCT_WEB_SITE "http://www.flighty.cn"
!define PRODUCT_UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\myapp"
!define PRODUCT_UNINST_ROOT_KEY "HKLM"

SetCompressor lzma
RequestExecutionLevel admin

!include "MUI2.nsh"

!define MUI_ABORTWARNING
!define MUI_ICON "${NSISDIR}\Contrib\Graphics\Icons\modern-install.ico"
!define MUI_UNICON "${NSISDIR}\Contrib\Graphics\Icons\modern-uninstall.ico"

; 语言选择窗口常量设置
!define MUI_LANGDLL_REGISTRY_ROOT "${PRODUCT_UNINST_ROOT_KEY}"
!define MUI_LANGDLL_REGISTRY_KEY "${PRODUCT_UNINST_KEY}"
!define MUI_LANGDLL_REGISTRY_VALUENAME "NSIS:Language"

!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_DIRECTORY
!insertmacro MUI_PAGE_INSTFILES
!insertmacro MUI_PAGE_FINISH

!insertmacro MUI_UNPAGE_INSTFILES

; 语言设置
!insertmacro MUI_LANGUAGE "English"
!insertmacro MUI_LANGUAGE "SimpChinese"
; 语言相关字符串
LangString LNG_AppName ${LANG_ENGLISH} "flighty'app"
LangString LNG_AppName ${LANG_SIMPCHINESE} "轻狂的程序"
LangString UNINSTALL_CONFIRM ${LANG_ENGLISH} "Thank you very much! $(^Name) has been successfully removed."
LangString UNINSTALL_CONFIRM ${LANG_SIMPCHINESE} "非常感謝您的使用！ $(^Name) 已成功地从您的计算机中移除。"


Name "$(LNG_AppName)"
OutFile "Setup.exe"
InstallDir "$PROGRAMFILES\My application"
ShowInstDetails show
ShowUnInstDetails show

Section "MainSection" SEC01
  StrCpy $0 $(LNG_AppName)
	${If} $0 == "flighty'app"
  	MessageBox MB_OK "ENGLISH"
	${Else}
  	MessageBox MB_OK "简体中文"
	${EndIf}
SectionEnd

Section -AdditionalIcons
  SetOutPath $INSTDIR
  WriteIniStr "$INSTDIR\${PRODUCT_NAME}.url" "InternetShortcut" "URL" "${PRODUCT_WEB_SITE}"
  CreateDirectory "$SMPROGRAMS\My application"
  CreateShortCut "$SMPROGRAMS\My application\Website.lnk" "$INSTDIR\${PRODUCT_NAME}.url"
  CreateShortCut "$SMPROGRAMS\My application\Uninstall.lnk" "$INSTDIR\uninst.exe"
SectionEnd

Section -Post
  WriteUninstaller "$INSTDIR\uninst.exe"
  WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayName" "$(^Name)"
  WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "UninstallString" "$INSTDIR\uninst.exe"
  WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayVersion" "${PRODUCT_VERSION}"
  WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "URLInfoAbout" "${PRODUCT_WEB_SITE}"
  WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "Publisher" "${PRODUCT_PUBLISHER}"
SectionEnd


Function .onInit
  !insertmacro MUI_LANGDLL_DISPLAY
FunctionEnd

Section Uninstall
  Delete "$INSTDIR\${PRODUCT_NAME}.url"
  Delete "$INSTDIR\uninst.exe"

  Delete "$SMPROGRAMS\My application\Uninstall.lnk"
  Delete "$SMPROGRAMS\My application\Website.lnk"

  RMDir "$SMPROGRAMS\My application"

  RMDir "$INSTDIR"

  DeleteRegKey ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}"
  SetAutoClose true
SectionEnd

Function un.onInit
  !insertmacro MUI_UNGETLANGUAGE
FunctionEnd

Function un.onUninstSuccess
  HideWindow
  MessageBox MB_ICONINFORMATION|MB_OK "$(UNINSTALL_CONFIRM)"
FunctionEnd