diff --git a/.gitignore b/.gitignore
index da97ff7..fedd318 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.swf
+*.swc
diff --git a/03d1-datagrid/DataGridExample.mxml b/03d1-datagrid/DataGridExample.mxml
index c7df993..e69a051 100644
--- a/03d1-datagrid/DataGridExample.mxml
+++ b/03d1-datagrid/DataGridExample.mxml
@@ -13,11 +13,13 @@
             import mx.rpc.events.FaultEvent;
             import mx.controls.Alert;
 
+            import RequestParams;
+
             [Bindable]
             private var photoFeed:ArrayCollection;
 
             private function requestPhotos():void {
-                var params:Object = new Object();
+                var params:RequestParams = new RequestParams();
                 params.format = 'rss_200_enc';
                 params.tags = searchTerms.text;
                 photoService.send(params);
diff --git a/Makefile b/Makefile
index 71d449b..c28c014 100644
--- a/Makefile
+++ b/Makefile
@@ -3,10 +3,11 @@
 #    http://learn.adobe.com/wiki/display/Flex/Getting+Started
 
 
-# sets mxmlc to just the basename "mxmlc"
+# sets mxmlc and compc to their respective basenames
 # if not overridden in command line like so:
 #    make MXMLC=/path/to/my/mxmlc
 MXMLC ?= mxmlc
+COMPC ?= compc
 
 
 # define all target swf paths (which don't yet exist if
@@ -14,16 +15,29 @@ MXMLC ?= mxmlc
 SWFS = $(patsubst %.mxml,%.swf,$(wildcard [0-9]*-*/*.mxml))
 
 
+# define all target swc paths (same as with swf paths above)
+SWCS = $(patsubst %.as,%.swc,$(wildcard comps/*.as))
+
+
 # define an implicit build rule for any file matching %.swf,
 # using the $< (input) and $@ (output) automatic variables
 %.swf : %.mxml
-	$(MXMLC) $< -warnings -output $@
+	$(MXMLC) $< -warnings -l+=./comps -output $@
+
+
+# define an implicit build rule for any file matching %.swc,
+# using the $< (input) and $@ (output) automatic variables
+# just like with the %.swf implicit rule above
+%.swc : %.as
+	_CLS=$$(echo $< | sed 's@.*/\(.*\)\..*$$@\1@') && \
+	$(COMPC) -sp ./comps -output $@ -include-classes $$_CLS
 
 
-# build all expected swf files
-all: $(SWFS)
+# build all expected swf and swc files
+all: $(SWCS) $(SWFS) 
 
 
 # remove all swf files in the tree
 clean:
-	find -name \*.swf -exec rm {} \;
+	find -name \*.swf -exec rm {} \; ; \
+	find -name \*.swc -exec rm {} \;
diff --git a/comps/RequestParams.as b/comps/RequestParams.as
new file mode 100644
index 0000000..d6ccb46
--- /dev/null
+++ b/comps/RequestParams.as
@@ -0,0 +1,8 @@
+package
+{
+    public class RequestParams
+    {
+        public var format:String;
+        public var tags:String;
+    }
+}