[peterw] 30749: - Add back detection of previous versions of RosBE (versions 0.3.5b2 and before).

Author: peterw
Date: Sun Nov 25 21:16:54 2007
New Revision: 30749

URL: http://svn.reactos.org/svn/reactos?rev=30749&view=rev
Log:
- Add back detection of previous versions of RosBE (versions 0.3.5b2 and before).

Modified:
    trunk/tools/RosBE/RosBE-Windows/RosBE.nsi

Modified: trunk/tools/RosBE/RosBE-Windows/RosBE.nsi
URL: http://svn.reactos.org/svn/reactos/trunk/tools/RosBE/RosBE-Windows/RosBE.nsi...
==============================================================================
--- trunk/tools/RosBE/RosBE-Windows/RosBE.nsi (original)
+++ trunk/tools/RosBE/RosBE-Windows/RosBE.nsi Sun Nov 25 21:16:54 2007
@@ -348,7 +348,15 @@
         Quit
     ${EndIf}
     ${If} $R0 == ""
-        Return
+        ReadRegStr $R0 HKLM \
+                   "Software\Microsoft\Windows\CurrentVersion\Uninstall\ReactOS Build Environment" \
+                   "UninstallString"
+        ReadRegStr $R1 HKLM \
+                   "Software\Microsoft\Windows\CurrentVersion\Uninstall\ReactOS Build Environment" \
+                   "DisplayVersion"
+        ${If} $R0 == ""
+            Return
+        ${EndIf}
     ${EndIf}
     MessageBox MB_YESNO|MB_ICONQUESTION  \
                "A previous version of the ${PRODUCT_NAME} was found. You must uninstall it before installing this version.$\n$\nDo you want to do that now?" \