diff --git a/stepmania/src/archutils/Win32/GraphicsWindow.cpp b/stepmania/src/archutils/Win32/GraphicsWindow.cpp
index 9748bb1ef7..469537d8ca 100644
--- a/stepmania/src/archutils/Win32/GraphicsWindow.cpp
+++ b/stepmania/src/archutils/Win32/GraphicsWindow.cpp
@@ -49,6 +49,8 @@ static RString GetNewWindow()
 
 static LRESULT CALLBACK GraphicsWindow_WndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
 {
+	CHECKPOINT_M( ssprintf("%p, %u, %08x, %08x", hWnd, msg, wParam, lParam) );
+
 	/* Suppress autorun. */
 	if( msg == g_iQueryCancelAutoPlayMessage )
 		return true;
@@ -159,6 +161,8 @@ static LRESULT CALLBACK GraphicsWindow_WndProc( HWND hWnd, UINT msg, WPARAM wPar
 	}
 	}
 
+	CHECKPOINT_M( ssprintf("%p, %u, %08x, %08x", hWnd, msg, wParam, lParam) );
+
 	if( m_bWideWindowClass )
 		return DefWindowProcW( hWnd, msg, wParam, lParam );
 	else