--- Source/cmVisualStudio10TargetGenerator.cxx	Sun Nov 14 13:30:43 2010
+++ cmVisualStudio10TargetGeneratorMidlPatch.cxx	Sun Nov 14 13:45:41 2010
@@ -431,6 +431,7 @@
   std::vector<cmSourceFile*> customBuild;
   std::vector<cmSourceFile*> none;
   std::vector<cmSourceFile*> headers;
+  std::vector<cmSourceFile*> idls;
   std::vector<cmSourceFile*> resource;
   
   for(std::vector<cmSourceFile*>::const_iterator s = classes.begin(); 
@@ -465,6 +466,10 @@
       {
       headers.push_back(sf);
       }
+    else if(sf->GetExtension() == "idl")
+      {
+      idls.push_back(sf);
+      }
     else
       {
       none.push_back(sf);
@@ -493,6 +498,7 @@
   this->WriteGroupSources("ClCompile", clCompile, sourceGroups);
   this->WriteGroupSources("ClInclude", headers, sourceGroups);
   this->WriteGroupSources("ResourceCompile", resource, sourceGroups);
+  this->WriteGroupSources("Midl", idls, sourceGroups);
   this->WriteGroupSources("CustomBuild", customBuild, sourceGroups);
 
   this->WriteString("<ItemGroup>\n", 1);
@@ -665,6 +671,7 @@
       const char* lang = (*source)->GetLanguage();
       bool cl = lang && (strcmp(lang, "C") == 0 || strcmp(lang, "CXX") ==0);
       bool rc = lang && (strcmp(lang, "RC") == 0);
+      bool idl = (*source)->GetExtension() == "idl";
       std::string sourceFile = (*source)->GetFullPath();
       sourceFile =  cmSystemTools::RelativePath(
         this->Makefile->GetCurrentOutputDirectory(),
@@ -683,6 +690,10 @@
         {
         this->WriteString("<ResourceCompile Include=\"", 2);
         }
+      else if(idl)
+        {
+        this->WriteString("<Midl Include=\"", 2);
+        }
       else
         {
         this->WriteString("<None Include=\"", 2);
@@ -1389,6 +1400,11 @@
 {
   this->WriteString("<Midl>\n", 2);
   this->OutputIncludes(includes);
+  this->WriteString("<OutputDirectory>$(IntDir)</OutputDirectory>\n",3);
+  this->WriteString("<HeaderFileName>%(Filename).h</HeaderFileName>\n",3);
+  this->WriteString("<TypeLibraryName>%(Filename).tlb</TypeLibraryName>\n",3);
+  this->WriteString("<InterfaceIdentifierFileName>%(Filename)_i.c</InterfaceIdentifierFileName>\n",3);
+  this->WriteString("<ProxyFileName>%(Filename)_p.c</ProxyFileName>\n",3);
   this->WriteString("</Midl>\n", 2);
 }