check for prerequisites: Windows XP or Windows Server 2003 and .NET Framework 2.0

diff --git a/windows/build/graphviz.wxs.in b/windows/build/graphviz.wxs.in
index db03fbe46fa12a19c0462ed43b52ba434a804b99..2ad086cd26160a8637ced9d841a76dffb8a43aec 100755 (executable)
--- a/windows/build/graphviz.wxs.in
+++ b/windows/build/graphviz.wxs.in
@@ -21,6 +21,13 @@
                <Property Id="ARPHELPLINK" Value="http://www.graphviz.org/" />
                <Property Id="ARPURLUPDATEINFO" Value="http://www.graphviz.org/Download_windows.php" />
 
+               <Condition Message="Windows XP, Windows Server 2003 or later is required.">
+                       <![CDATA[VersionNT >= 501]]>
+               </Condition>
+               <Condition Message=".NET Framework 2.0 or later is required.">
+                       <![CDATA[MsiNetAssemblySupport >= "2.0.50727"]]>
+               </Condition>    
+               
                <UIRef Id="WixUI_Mondo" />
 
                <Media Id="1" Cabinet="graphviz.cab" EmbedCab="yes" />