// Win32Demo.cpp

#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
bool initWindow(HINSTANCE hInstance);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,  LPSTR lpCmdLine, int nCmdShow)
{
  if (!initWindow(hInstance))
    return false;

  MSG msg;
  ZeroMemory(&msg, sizeof(msg));
  while (GetMessage(&msg, NULL, 0, 0))
  {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }
  return (int) msg.wParam;
}

bool initWindow(HINSTANCE hInstance)
{
  HWND wndHandle;
  WNDCLASSEX wcex;

  wcex.cbSize = sizeof(WNDCLASSEX);
  wcex.style = CS_HREDRAW | CS_VREDRAW;
  wcex.lpfnWndProc = (WNDPROC) WndProc;
  wcex.cbClsExtra = 0;
  wcex.cbWndExtra = 0;
  wcex.hInstance = hInstance;
  wcex.hIcon = 0;
  wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
  wcex.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);
  wcex.lpszMenuName = NULL;
  wcex.lpszClassName = "Win32DemoClassWnd";
  wcex.hIconSm = 0;
  RegisterClassEx(&wcex);

  wndHandle = CreateWindow("Win32DemoClassWnd", "Win32Demo",
    WS_OVERLAPPEDWINDOW,
    CW_USEDEFAULT,
    CW_USEDEFAULT,
    640, 480,
    NULL, NULL,
    hInstance,
    NULL);

  if (!wndHandle)
    return false;

  ShowWindow(wndHandle, SW_SHOW);
  UpdateWindow(wndHandle);

  return true;
}


LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  switch (message)
  {
  case WM_DESTROY:
    PostQuitMessage(0);
    return 0;
  }
  return DefWindowProc(hWnd, message, wParam, lParam);
}