Added GetWinVer instruction

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@7309 212acab6-be3b-0410-9dea-997c60f758d6

Docs/src/generalpurpose.but

@@ -51,6 +51,14 @@ The error flag is set if the shortcut cannot be created (i.e. either of the path
 \c   "some command line parameters" "$INSTDIR\My Program.exe" 2 SW_SHOWNORMAL \
 \c   ALT|CONTROL|SHIFT|F5 "a description"
 
+\S2{getwinver} GetWinVer
+
+\c user_var(output) Major|Minor|Build|ServicePack
+
+Gets the Windows version as reported by GetVersionEx. WinVer.nsh is the preferred method for performing Windows version checks.
+
+\c GetWinVer $1 Build
+
 \S2{getdllversion} GetDLLVersion
 
 \c filename user_var(high dword output) user_var(low dword output)

Docs/src/history.but

@@ -18,6 +18,8 @@ Released on ???? ??th, 20??
 
 \b Added \cw{$USER..} and \cw{$COMMON..} alias constants
 
+\b Added \R{getwinver}{GetWinVer} instruction
+
 \b Disallow start maximized mode
 
 \b Added /LAUNCH compiler switch