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  <blog_url>https://blog.systemjp.net/</blog_url>
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  <description>#include &lt;chrono&gt; #include &lt;ctime&gt; #include &lt;iomanip&gt; #include &lt;sstream&gt; #include &lt;string&gt; #include &lt;Windows.h&gt; // 日本時間で営業時間内（9:00-15:30、土日を除く）かどうかを判定する関数 BOOL IsJapanMarketHours() { // 現在のUTC時間を取得 auto now = std::chrono::system_clock::now(); auto now_time_t = std::chrono::system_clock::to_time_t(no…</description>
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  <provider_name>Hatena Blog</provider_name>
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  <published>2025-04-07 14:17:09</published>
  <title>C++(MFC) 簡易ザラ場判定関数</title>
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