3 files changed, 126 insertions, 0 deletions
diff --git a/gui/win32/src/butck_gui.rc b/gui/win32/src/butck_gui.rc
new file mode 100644
index 0000000..a609d9d
--- /dev/null
+++ b/gui/win32/src/butck_gui.rc
@@ -0,0 +1,14 @@
+#include "windows.h"
+#include "resource.h"
+
+IDR_MAINMENU MENU
+BEGIN
+    POPUP "Files(&F)"
+    BEGIN
+        MENUITEM "Exit(&X)", IDM_EXIT
+    END
+    POPUP "Help(&H)"
+    BEGIN
+        MENUITEM "About(&A)...", IDM_ABOUT
+    END
+END
diff --git a/gui/win32/src/main.c b/gui/win32/src/main.c
new file mode 100644
index 0000000..b7f7603
--- /dev/null
+++ b/gui/win32/src/main.c
@@ -0,0 +1,101 @@
+#include "resource.h"
+#include <windows.h>
+
+// Global variables
+static HINSTANCE hInst;
+const wchar_t CLASS_NAME[] = L"ButchunkerWindow";
+
+// Function declarations
+LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
+                    PWSTR pCmdLine, int nCmdShow)
+{
+    (void)hPrevInstance; // Unused parameter
+    (void)pCmdLine;      // Unused parameter
+
+    hInst = hInstance;
+
+    // Register window class
+    WNDCLASSW windowClass = {0};
+    windowClass.lpfnWndProc   = WindowProc;
+    windowClass.hInstance     = hInstance;
+    windowClass.lpszClassName = CLASS_NAME;
+    windowClass.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
+    windowClass.hCursor       = LoadCursor(NULL, IDC_ARROW);
+    windowClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
+    windowClass.lpszMenuName  = MAKEINTRESOURCE(IDR_MAINMENU);
+
+    if (!RegisterClassW(&windowClass)) {
+        MessageBoxW(NULL, L"Window class registration failed!", L"Error", MB_ICONERROR);
+        return 0;
+    }
+
+    const int WINDOW_WIDTH = 800;
+    const int WINDOW_HEIGHT = 600;
+
+    // Create window
+    HWND hwnd = CreateWindowExW(
+        0,                              // Extended window style
+        CLASS_NAME,                     // Window class name
+        L"Butchunker - File Chunking Tool",   // Window title
+        WS_OVERLAPPEDWINDOW,           // Window style
+        CW_USEDEFAULT, CW_USEDEFAULT,  // Position
+        WINDOW_WIDTH, WINDOW_HEIGHT,   // Size
+        NULL,                          // Parent window
+        NULL,                          // Menu
+        hInstance,                     // Instance handle
+        NULL                           // Additional data
+    );
+
+    if (hwnd == NULL) {
+        MessageBoxW(NULL, L"Window creation failed!", L"Error", MB_ICONERROR);
+        return 0;
+    }
+
+    // Show window
+    ShowWindow(hwnd, nCmdShow);
+    UpdateWindow(hwnd);
+
+    // Message loop
+    MSG msg = {0};
+    while (GetMessage(&msg, NULL, 0, 0)) {
+        TranslateMessage(&msg);
+        DispatchMessage(&msg);
+    }
+
+    return 0;
+}
+
+// Window procedure function
+LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    switch (uMsg) {
+        case WM_COMMAND: {
+            int wmId = LOWORD(wParam);
+
+            switch (wmId) {
+                case IDM_EXIT:
+                    DestroyWindow(hwnd);
+                    break;
+
+                case IDM_ABOUT:
+                    MessageBoxW(hwnd, L"Butchunker - File Chunking Tool\nVersion 1.0.0", L"About", MB_OK);
+                    break;
+
+                default:
+                    return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+            }
+            break;
+        }
+
+        case WM_DESTROY:
+            PostQuitMessage(0);
+            return 0;
+
+        default:
+            return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+    }
+
+    return 0;
+}
diff --git a/gui/win32/src/resource.h b/gui/win32/src/resource.h
new file mode 100644
index 0000000..d28d2b2
--- /dev/null
+++ b/gui/win32/src/resource.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#define IDR_MAINMENU 101
+
+#define IDM_EXIT 1001
+#define IDM_ABOUT 1002
+
+#define IDC_MYBUTTON 2001
+
+#define IDC_SELECT_FILE  1003
+#define IDC_STATUS_LABEL 1004