Update buildno for 2.4a3
diff --git a/PCbuild/BUILDno.txt b/PCbuild/BUILDno.txt
index 37d5978..9b364a6 100644
--- a/PCbuild/BUILDno.txt
+++ b/PCbuild/BUILDno.txt
@@ -33,6 +33,8 @@
 
 Windows Python BUILD numbers
 ----------------------------
+  56    2.4.0a3
+        2-Sep-2004
   55    2.4.0a2
         4-Aug-2004
   54    2.4.0a1
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index b4cda83..59498b3 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1382,7 +1382,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="2"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=55"/>
+					PreprocessorDefinitions="BUILD=56"/>
 			</FileConfiguration>
 			<FileConfiguration
 				Name="Debug|Win32">
@@ -1390,7 +1390,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="0"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=55"/>
+					PreprocessorDefinitions="BUILD=56"/>
 			</FileConfiguration>
 			<FileConfiguration
 				Name="ReleaseItanium|Win32">
@@ -1398,7 +1398,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="2"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=55"/>
+					PreprocessorDefinitions="BUILD=56"/>
 			</FileConfiguration>
 		</File>
 		<File