A couple more wrappers for ImGuiNative methods

src/ImGui.NET/ImGui.cs

@@ -121,11 +121,24 @@ namespace ImGuiNET
             ImGuiNative.igBeginMenuBar();
         }
 
+        public static void CloseCurrentPopup()
+        {
+            ImGuiNative.igCloseCurrentPopup();
+        }
+
         public static bool BeginWindow(string windowTitle, ref bool opened, Vector2 startingSize, WindowFlags flags)
         {
             return ImGuiNative.igBegin2(windowTitle, ref opened, startingSize, 1f, flags);
         }
 
+        public static unsafe bool Checkbox(string label, ref bool value)
+        {
+            bool localVal = value;
+            bool result = ImGuiNative.igCheckbox(label, &localVal);
+            value = localVal;
+            return result;
+        }
+
         public static void EndMenuBar()
         {
             ImGuiNative.igEndMenuBar();

src/ImGui.NET/ImGuiNative.cs

@@ -265,7 +265,7 @@ namespace ImGuiNET
         public static extern void igTextWrapped(string fmt);
 
         [DllImport(cimguiLib)]
-        public static extern void igTextUnformatted(string text, string text_end);
+        public static extern void igTextUnformatted(byte* text, byte* text_end);
 
         [DllImport(cimguiLib)]
         public static extern void igLabelText(string label, string fmt);