#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst, LPSTR lpszArgs, int nWinMode){
  HWND hwnd;
  MSG msg;
	
  WNDCLASSEX wc;
	
  wc.style = CS_HREDRAW | CS_VREDRAW;
  wc.lpfnWndProc = (WNDPROC)WndProc;
  wc.cbClsExtra = 0;
  wc.cbWndExtra = 0;
  wc.cbSize = sizeof(WNDCLASSEX);
  wc.hInstance = hThisInst;
  wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
  wc.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
  wc.hCursor = LoadCursor(NULL, IDC_ARROW);
  wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
  wc.lpszMenuName = NULL;
  wc.lpszClassName = "MyWin";
	
  if(!RegisterClassEx(&wc)) return(0);
	
	/* ウィンドウの生成 */
  hwnd = CreateWindow(
    "MyWin",
    "Windows example",
    WS_OVERLAPPEDWINDOW,
    CW_USEDEFAULT,		// 表示位置(X座標)
    CW_USEDEFAULT,		// 表示位置(Y座標)
    320,							// 幅
    240,							// 高さ
    HWND_DESKTOP,
    NULL,
    hThisInst,
    NULL
  );

  ShowWindow(hwnd, nWinMode);
  UpdateWindow(hwnd);
	
  while(GetMessage(&msg, NULL, 0, 0))
  {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }
  return(msg.wParam);
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
  HDC hDC;
  PAINTSTRUCT	ps;

  switch(message){

  case WM_PAINT:        /* 再描画要求メッセージ取得時 */
    hDC =  BeginPaint(hwnd, &ps);
    TextOut(hDC, 0, 0, "Hello", lstrlen("Hello"));
    EndPaint(hwnd, &ps);
    break;

  case WM_DESTROY:      /* プログラムの終了メッセージ取得時 */
    PostQuitMessage(0);
    break;
		
  default:
    return(DefWindowProc(hwnd, message, wParam, lParam));
  }
  return(0);
}