updated ui to use multiple screens

windows_xp_driver_ui/installer.nsi

@@ -1,11 +1,12 @@
 ; Transit Driver XP custom installer
 !include "MUI2.nsh"
+!include "WinVer.nsh"
 
 !define APPNAME "Transit Driver XP"
 !define COMPANYNAME "Transit Project"
 !define DESCRIPTION "Native Windows XP-compatible driver app"
 !define VERSIONMAJOR 1
-!define VERSIONMINOR 0
+!define VERSIONMINOR 1
 !define VERSIONBUILD 0
 
 Name "${APPNAME}"
@@ -14,12 +15,35 @@ InstallDir "$PROGRAMFILES\TransitDriverXP"
 InstallDirRegKey HKCU "Software\TransitDriverXP" "InstallDir"
 RequestExecutionLevel admin
 
+VIProductVersion "${VERSIONMAJOR}.${VERSIONMINOR}.${VERSIONBUILD}.0"
+VIAddVersionKey "ProductName" "${APPNAME}"
+VIAddVersionKey "CompanyName" "${COMPANYNAME}"
+VIAddVersionKey "LegalCopyright" "Transit Project"
+VIAddVersionKey "FileDescription" "${DESCRIPTION}"
+VIAddVersionKey "FileVersion" "${VERSIONMAJOR}.${VERSIONMINOR}.${VERSIONBUILD}"
+VIAddVersionKey "ProductVersion" "${VERSIONMAJOR}.${VERSIONMINOR}.${VERSIONBUILD}"
+
+Function .onInit
+    ReadRegStr $0 HKCU "Software\TransitDriverXP" "InstallDir"
+    StrCmp $0 "" done
+
+    IfFileExists "$0\driver_xp.exe" 0 done
+    StrCpy $INSTDIR $0
+    MessageBox MB_OK|MB_ICONINFORMATION "An existing Transit Driver XP installation was found. It will be updated in $INSTDIR."
+
+    ; Release the old executable before NSIS replaces it.
+    ExecWait '"$SYSDIR\taskkill.exe" /F /IM driver_xp.exe'
+
+done:
+FunctionEnd
+
 !insertmacro MUI_PAGE_DIRECTORY
 !insertmacro MUI_PAGE_INSTFILES
 !insertmacro MUI_LANGUAGE "English"
 
 Section "Install"
     SetOutPath "$INSTDIR"
+    SetOverwrite on
     File "driver_xp.exe"
     File "README.md"