diff -u cmVisualStudio10TargetGenerator.cxx.old cmVisualStudio10TargetGenerator.cxx.new
--- cmVisualStudio10TargetGenerator.cxx.old     2012-03-05 15:05:01.413321800 -0800
+++ cmVisualStudio10TargetGenerator.cxx.new     2012-03-05 15:10:34.055321800 -0800
@@ -834,6 +834,14 @@
       {
       // if the source file has specific flags the tag
       // is ended on a new line
+      // if VS_COMPILE_AS_MANAGED is set on the source file, then we add this property to the project file
+      const char* compileAsManaged = (*source)->GetProperty("VS_COMPILE_AS_MANAGED");
+      if(compileAsManaged)
+        {
+        this->WriteString("<CompileAsManaged>", 3);
+        (*this->BuildFileStream) << compileAsManaged;
+        (*this->BuildFileStream) << "</CompileAsManaged>\n";
+        }
       this->WriteString("</ClCompile>\n", 2);
       }
     else if(!header && rc && this->OutputSourceSpecificFlags(*source))
@@ -842,7 +850,24 @@
       }
     else
       {
-      (*this->BuildFileStream ) << " />\n";
+      // if VS_COMPILE_AS_MANAGED is set on the source file, then we add this property to the project file
+      if(cl &&  (*source)->GetProperty("VS_COMPILE_AS_MANAGED"))
+        {
+        const char* compileAsManaged = (*source)->GetProperty("VS_COMPILE_AS_MANAGED");
+        if(compileAsManaged)
+          {
+          (*this->BuildFileStream ) << ">\n";
+          this->WriteString("<CompileAsManaged>", 3);
+          (*this->BuildFileStream ) << compileAsManaged;
+          (*this->BuildFileStream ) << "</CompileAsManaged>\n";
+
+          this->WriteString("</ClCompile>\n", 2);
+          }
+        }
+      else
+        {
+        (*this->BuildFileStream ) << " />\n";
+        }
       }
     }
   this->WriteString("</ItemGroup>\n", 1);

diff -u cmSourceFile.cxx.old cmSourceFile.cxx.new
--- cmSourceFile.cxx.old        2012-03-05 15:04:41.451321800 -0800
+++ cmSourceFile.cxx.new        2012-03-05 15:02:43.685321800 -0800
@@ -546,6 +546,14 @@
      "instead used as a symbolic name for a build rule.");

   cm->DefineProperty
+    ("VS_COMPILE_AS_MANAGED", cmProperty::SOURCE_FILE,
+     "Sets the CompileAsManaged attribute for Visual Studio projects.",
+     "This property affects Visual Studio generator. "
+     "When defined on a given source file, it will add the "
+     "\"ComileAsManaged\" attribute to the file properties in the "
+     "generated project.");
+
+  cm->DefineProperty
     ("WRAP_EXCLUDE", cmProperty::SOURCE_FILE,
      "Exclude this source file from any code wrapping techniques.",
      "Some packages can wrap source files into alternate languages "