--- /dev/null
+#include <msp/strings/format.h>
+#include "videomode.h"
+
+namespace Msp {
+namespace Graphics {
+
+unsupported_video_mode::unsupported_video_mode(const VideoMode &mode):
+ runtime_error(format("%dx%d", mode.width, mode.height))
+{ }
+
+} // namespace Graphics
+} // namespace Msp