D3D 9

How to use Nuklear with DirectX9. Here i show you the basics of setting it up and handling the DeviceLost state.

Setting up Nuklear for DirectX rendering.

 /* Initiating the GUI */
 ctx = nk_d3d9_init(d3ddev, s_width, s_height);
 struct nk_font_atlas *atlas;
 {struct nk_font_atlas *atlas;
 nk_d3d9_font_stash_begin(&atlas);
 nk_d3d9_font_stash_end();
 }

Handle input events.

 MSG msg;

   nk_input_begin(ctx);

   while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
        if (msg.message == WM_QUIT)
            running = 0;
        TranslateMessage(&msg);
        DispatchMessageW(&msg);
    }
    nk_input_end(ctx);

In WindowProc

 if (nk_d3d9_handle_event(hwnd, message, wParam, lParam))
	return 0;

While DeviceLost

      if (ctx)
	{
		nk_free(ctx);
		ctx = NULL;
	}
	nk_d3d9_release();
	hr = d3ddev->Reset(&d3dpp);
	if (SUCCEEDED(hr)) {
		ctx = nk_d3d9_init(d3ddev, s_width, s_height);
		struct nk_font_atlas *atlas;
		nk_d3d9_font_stash_begin(&atlas);
		nk_d3d9_font_stash_end();
		
	}

Render

nk_begin(ctx, "TestWindow", nk_rect(50, 50, 400, 250),NK_WINDOW_MOVABLE |NK_WINDOW_TITLE);
nk_end(ctx);
nk_d3d9_render(NK_ANTI_ALIASING_ON);

Code from https://github.com/vurtun/nuklear/blob/master/demo/d3d9/main.c There you can see how to set it up and how to render but its not covered how to recreate resources while the device has been lost.