下記は効果音再生にPlaySoundを使ったサンプル
>>483に追加

LRESULT CALLBACK WinProc (
 HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
 switch (uMsg)
 {
  case WM_COMMAND:
   switch(LOWORD(wParam)){
    case 1:
     PlaySound("コイン音 貯金箱に一枚 coin08.wav",
         NULL, SND_ASYNC | SND_FILENAME);
      break;
    }
    break;
  case WM_CREATE:
    //ボタン配置
    CreateWindow("BUTTON", "効果音",
      WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS |
      WS_CLIPCHILDREN | BS_PUSHBUTTON,
      0, 128, 64, 24, hWnd, (HMENU)1,
      (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), NULL);
 }