diff --git a/except.hpp b/except.hpp
index d6b305e..f8c4c48 100644
--- a/except.hpp
+++ b/except.hpp
@@ -49,7 +49,7 @@ namespace cruft::vk {
                 VkResult
             >);
 
-            try_code (std::invoke (func, std::forward<Args> (args)...));
+            try_code (func (std::forward<Args> (args)...));
         }
 
 
@@ -67,7 +67,7 @@ namespace cruft::vk {
 
 
         template <
-            template <typename...> class ContainerT,
+            template <typename...> class ContainerT = std::vector,
             typename FuncT,
             typename ...Args
         >
@@ -77,18 +77,22 @@ namespace cruft::vk {
             uint32_t expected = 0;
             try_func (func, args..., &expected, nullptr);
 
-            using ResultT = std::remove_pointer_t<
+            using ValueT = std::remove_pointer_t<
                 std::tuple_element_t<
                     sizeof...(Args) + 1,
                     typename func_traits<FuncT>::argument_types
                 >
             >;
 
-            ContainerT<ResultT> values (expected);
+            ValueT values[expected];
             uint32_t found = 0;
-            try_func (func, args..., &found, std::data (values));
+            try_func (func, args..., &found, values + 0);
             CHECK_EQ (expected, found);
-            return values;
+
+            return ContainerT<ValueT> {
+                values + 0,
+                values + found
+            };
         }
     };
 
diff --git a/tools/hello.cpp b/tools/hello.cpp
index 70f4166..80936f6 100644
--- a/tools/hello.cpp
+++ b/tools/hello.cpp
@@ -117,37 +117,13 @@ main (void)
         glfwCreateWindowSurface (instance.id (), window, nullptr, &surface)
     );
 
-    VkSurfaceCapabilitiesKHR surface_capabilities;
-    std::vector<VkSurfaceFormatKHR> surface_formats;
-    std::vector<VkPresentModeKHR> present_modes;
-
-    cruft::vk::error::try_func (
-        &vkGetPhysicalDeviceSurfaceCapabilitiesKHR, pdevice.id (), surface, &surface_capabilities
+    auto surface_capabilities = pdevice.surface_capabilities (surface);
+    std::vector<VkSurfaceFormatKHR> surface_formats = cruft::vk::error::try_array (
+        vkGetPhysicalDeviceSurfaceFormatsKHR, pdevice.id (), surface
+    );
+    std::vector<VkPresentModeKHR> present_modes = cruft::vk::error::try_array (
+        vkGetPhysicalDeviceSurfacePresentModesKHR, pdevice.id (), surface
     );
-    {
-        uint32_t format_count = 0;
-        cruft::vk::error::try_code (
-            vkGetPhysicalDeviceSurfaceFormatsKHR (pdevice.id (), surface, &format_count, nullptr)
-        );
-
-        surface_formats.resize (format_count);
-        cruft::vk::error::try_code (
-            vkGetPhysicalDeviceSurfaceFormatsKHR (
-                pdevice.id (), surface, &format_count, surface_formats.data ()
-            )
-        );
-
-
-        uint32_t present_count = 0;
-        cruft::vk::error::try_code (
-            vkGetPhysicalDeviceSurfacePresentModesKHR (pdevice.id (), surface, &present_count, nullptr)
-        );
-
-        present_modes.resize (present_count);
-        cruft::vk::error::try_code (
-            vkGetPhysicalDeviceSurfacePresentModesKHR (pdevice.id (), surface, &present_count, nullptr)
-        );
-    }
 
     auto queues = pdevice.queue_families ();
     int graphics_queue_id = -1, present_queue_id = -1;
@@ -255,9 +231,8 @@ main (void)
     cruft::vk::error::try_code (
         vkGetSwapchainImagesKHR (ldevice.id (), swapchain, &swap_image_count, nullptr)
     );
-    std::vector<VkImage> swap_images (swap_image_count);
-    cruft::vk::error::try_code (
-        vkGetSwapchainImagesKHR (ldevice.id (), swapchain, &swap_image_count, swap_images.data ())
+    std::vector<VkImage> swap_images = cruft::vk::error::try_array (
+        vkGetSwapchainImagesKHR, ldevice.id (), swapchain
     );
 
     std::vector<VkImageView> swap_image_views (swap_image_count);