Index: src/libchcore/libchcore.vc90.vcproj
===================================================================
diff -u -r39db7f4bffdd185122d8dab0772bd6fc49a0b675 -r9352ed0c4fe447a36bc728640c307be6d41455fd
--- src/libchcore/libchcore.vc90.vcproj	(.../libchcore.vc90.vcproj)	(revision 39db7f4bffdd185122d8dab0772bd6fc49a0b675)
+++ src/libchcore/libchcore.vc90.vcproj	(.../libchcore.vc90.vcproj)	(revision 9352ed0c4fe447a36bc728640c307be6d41455fd)
@@ -51,6 +51,7 @@
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="2"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="4"
 			/>
 			<Tool
@@ -125,6 +126,7 @@
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="2"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool
@@ -198,6 +200,7 @@
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="2"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool
@@ -274,6 +277,7 @@
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="2"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool