forms+windows添加激活水印

1. 多语言水印文本，根据系统语言自动切换。
2. 水印显示在每个屏幕的右下角，位置动态调整。
3. 半透明灰色文字，微软雅黑字体。
4. 窗口无边框、置顶、透明背景，不干扰用户操作。
5. 支持多显示器。
6. 高DPI适配。

效果图：

step1:C:\Users\wangrusheng\RiderProjects\WinFormsApp37\WinFormsApp37\Program.cs

namespace WinFormsApp37;static class Program
{/// <summary>///  The main entry point for the application./// </summary>[STAThread]static void Main(){Application.SetHighDpiMode(HighDpiMode.PerMonitorV2);Application.EnableVisualStyles();foreach (var screen in Screen.AllScreens){new WatermarkForm(screen).Show();}Application.Run();}
}

step2:C:\Users\wangrusheng\RiderProjects\WinFormsApp37\WinFormsApp37\WatermarkForm.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Globalization;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace WinFormsApp37;public class WatermarkForm : Form
{[DllImport("user32.dll")]static extern int GetWindowLong(IntPtr hWnd, int nIndex);[DllImport("user32.dll")]static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);const int GWL_EXSTYLE = -20;const int WS_EX_LAYERED = 0x80000;const int WS_EX_TRANSPARENT = 0x20;private readonly string text1, text2;private readonly Font font = new Font("Microsoft YaHei", 20, FontStyle.Regular);public WatermarkForm(Screen screen){// 初始化窗口属性InitializeWindow();// 加载多语言文本var translations = LoadTranslations();string lang = CultureInfo.CurrentCulture.TwoLetterISOLanguageName;text1 = translations.TryGetValue($"{lang}_line1", out var t1) ? t1 : "Activate Windows";text2 = translations.TryGetValue($"{lang}_line2", out var t2) ? t2 : "Go to Settings to activate Windows";// 计算窗口位置CalculatePosition(screen);}private void InitializeWindow(){FormBorderStyle = FormBorderStyle.None;TopMost = true;BackColor = Color.Magenta;TransparencyKey = Color.Magenta;ShowInTaskbar = false;// 设置窗口样式int style = GetWindowLong(Handle, GWL_EXSTYLE);SetWindowLong(Handle, GWL_EXSTYLE, style | WS_EX_LAYERED | WS_EX_TRANSPARENT);}private Dictionary<string, string> LoadTranslations() => new(){["zh_line1"] = "激活 Windows",["zh_line2"] = "转到“设置”以激活 Windows",["en_line1"] = "Activate Windows",["en_line2"] = "Go to Settings to activate Windows",// 其他语言翻译...};private void CalculatePosition(Screen screen){using var g = CreateGraphics();var size1 = g.MeasureString(text1, font);var size2 = g.MeasureString(text2, font);int width = (int)Math.Max(size1.Width, size2.Width) + 20;int height = (int)(size1.Height + size2.Height) + 10;Location = new Point(screen.Bounds.Right - width - 50,screen.Bounds.Bottom - height - 80);Size = new Size(width, height);}protected override void OnPaint(PaintEventArgs e){base.OnPaint(e);using var brush = new SolidBrush(Color.FromArgb(160, 120, 120, 120));e.Graphics.DrawString(text1, font, brush, 0, 0);e.Graphics.DrawString(text2, font, brush, 0, font.Height + 2);}
}

end