Created demo using Win32 GDI rendering. Uses VS2015 for compiler.

.gitignore

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+demo/gdi/*.exe
+demo/gdi/*.obj

demo/gdi/build.bat

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+@echo off
+
+rem This will use VS2015 for compiler
+call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86
+
+cl /nologo /W3 /WX /O2 /fp:fast /Gm- /Fedemo.exe main.c user32.lib gdi32.lib /link /incremental:no

demo/gdi/main.c

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+/* nuklear - v1.00 - public domain */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <stdio.h>
+#include <string.h>
+
+#define WINDOW_WIDTH 800
+#define WINDOW_HEIGHT 600
+
+#define NK_INCLUDE_FIXED_TYPES
+#define NK_INCLUDE_DEFAULT_ALLOCATOR
+#include "nuklear_gdi.h"
+#include "nuklear_gdi.c"
+
+static LRESULT CALLBACK
+WindowProc(HWND wnd, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    switch (msg)
+    {
+    case WM_DESTROY:
+        PostQuitMessage(0);
+        return 0;
+    }
+
+    if (nk_gdi_handle_event(wnd, msg, wparam, lparam))
+        return 0;
+
+    return DefWindowProcW(wnd, msg, wparam, lparam);
+}
+
+int main(void)
+{
+    GdiFont* font;
+    struct nk_context *ctx;
+
+    WNDCLASSW wc;
+    ATOM atom;
+    RECT rect = { 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT };
+    DWORD style = WS_OVERLAPPEDWINDOW;
+    DWORD exstyle = WS_EX_APPWINDOW;
+    HWND wnd;
+    HDC dc;
+    int running = 1;
+    int needs_refresh = 1;
+
+    /* Win32 */
+    memset(&wc, 0, sizeof(wc));
+    wc.lpfnWndProc = WindowProc;
+    wc.hInstance = GetModuleHandleW(0);
+    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wc.lpszClassName = L"NuklearWindowClass";
+    atom = RegisterClassW(&wc);
+
+    AdjustWindowRectEx(&rect, style, FALSE, exstyle);
+
+    wnd = CreateWindowExW(exstyle, wc.lpszClassName, L"Nuklear Demo",
+        style | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT,
+        rect.right - rect.left, rect.bottom - rect.top,
+        NULL, NULL, wc.hInstance, NULL);
+    dc = GetDC(wnd);
+
+    /* GUI */
+    font = nk_gdifont_create("Arial", 14);
+    ctx = nk_gdi_init(font, dc, WINDOW_WIDTH, WINDOW_HEIGHT);
+    while (running)
+    {
+        MSG msg;
+
+        /* Input */
+        nk_input_begin(ctx);
+        if (needs_refresh == 0)
+        {
+            if (GetMessageW(&msg, NULL, 0, 0) <= 0)
+            {
+                running = 0;
+            }
+            else
+            {
+                TranslateMessage(&msg);
+                DispatchMessageW(&msg);
+            }
+            needs_refresh = 1;
+        }
+        else
+        {
+            needs_refresh = 0;
+        }
+        while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
+        {
+            if (msg.message == WM_QUIT)
+                running = 0;
+            TranslateMessage(&msg);
+            DispatchMessageW(&msg);
+            needs_refresh = 1;
+        }
+        nk_input_end(ctx);
+
+        /* GUI */
+        {struct nk_panel layout;
+        if (nk_begin(ctx, &layout, "Demo", nk_rect(50, 50, 200, 200),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
+            NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
+        {
+            enum {EASY, HARD};
+            static int op = EASY;
+            static int property = 20;
+
+            nk_layout_row_static(ctx, 30, 80, 1);
+            if (nk_button_label(ctx, "button", NK_BUTTON_DEFAULT))
+                fprintf(stdout, "button pressed\n");
+            nk_layout_row_dynamic(ctx, 30, 2);
+            if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
+            if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
+            nk_layout_row_dynamic(ctx, 22, 1);
+            nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
+        }
+        nk_end(ctx);}
+        if (nk_window_is_closed(ctx, "Demo")) break;
+
+        /* Draw */
+        nk_gdi_render(nk_rgb(30,30,30));
+    }
+
+    nk_gdifont_del(font);
+    ReleaseDC(wnd, dc);
+    UnregisterClassW(wc.lpszClassName, wc.hInstance);
+    return 0;
+}
+