diff --git a/Rakefile.rb b/Rakefile.rb
index 3d0c84d..a0d05ce 100644
--- a/Rakefile.rb
+++ b/Rakefile.rb
@@ -26,7 +26,7 @@ task :default do
       "modules/gl3n/gl3n",
       "modules/glamour/glamour",
     ].each do |dir|
-      sources += Dir["#{dir}/**/*.d"]
+      sources += Dir["#{dir}/**/*.{d,c}"]
     end
     sources << "build/obj2d/logoobj.d"
     env["D_IMPORT_PATH"] += [
@@ -38,8 +38,9 @@ task :default do
       "modules/glamour",
       "build/obj2d",
     ]
+    env["CFLAGS"] += ["-Wall", "-std=gnu99"]
     env["DFLAGS"] += ["-fversion=Derelict3", "-fversion=gl3n", "-fversion=SDLImage"]
-    env["LDFLAGS"] += ["-static-libgcc"]
+    env["LDFLAGS"] += ["-static-libgcc", "-mwindows"]
     env.build_root = "build"
     env.Obj2D("build/obj2d/logoobj.d", "model/gentex-logo.obj")
     env.Program("gss", sources)
diff --git a/src/displayinfo.c b/src/displayinfo.c
new file mode 100644
index 0000000..0ef53d5
--- /dev/null
+++ b/src/displayinfo.c
@@ -0,0 +1,51 @@
+/*
+ * Author: Josh Holtrop
+ * This Windows-specific module will get the screen size
+ * and return the number of monitors present.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <windows.h>
+
+void GetDisplaySize(int * width, int * height, int * num_monitors)
+{
+    int w = 0;
+    int h = 0;
+    int n = 0;
+
+    /* loop through the display devices to get their dimensions */
+    for (int i = 0; i < 10; i++)
+    {
+        DISPLAY_DEVICE dev;
+        dev.cb = sizeof(DISPLAY_DEVICE);
+        if (!EnumDisplayDevices(NULL, i, &dev, 0))
+            break;
+        /* we only want real display devices to matter */
+        if ((strcmp(dev.DeviceID, "") != 0) && (dev.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP))
+        {
+            HDC hdc = CreateDC(TEXT("DISPLAY"), dev.DeviceString, NULL, NULL);
+            if (hdc != NULL)
+            {
+                n++;
+                w += GetDeviceCaps(hdc, HORZRES);
+                int thisHeight = GetDeviceCaps(hdc, VERTRES);
+                /* assume monitors are all horizontally aligned */
+                if (thisHeight > h)
+                    h = thisHeight;
+            }
+        }
+    }
+
+    /* only update width and height if we have valid data */
+    if (w != 0 && h != 0)
+    {
+        if (width != NULL)
+            *width = w;
+        if (height != NULL)
+            *height = h;
+        if (num_monitors != NULL)
+            *num_monitors = n;
+    }
+}