MillyC https://blog.hatena.ne.jp/MillyC/ Milly のメモ https://millyc.hatenadiary.org/ *Programming .NET C# 2.0 で実装。 ご利用はご自由に。 参考: using System; using System.Runtime.InteropServices; using System.Windows.Forms; using System.Drawing; public class CenterMessageBox { #region defines private static class NativeMethods { [DllImport("user32.dll")] public static extern IntPtr GetWindowLong(IntPtr hWnd, int nI… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmillyc.hatenadiary.org%2Fentry%2F20080312%2F1205311545" title="メッセージボックスを owner の中央に表示、ついでにディスプレイ内に収める - Milly のメモ" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-03-12 17:45:45 rich https://millyc.hatenadiary.org/entry/20080312/1205311545 1.0 100%