using System; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Diagnostics.Eventing.Reader; using System.Linq; using System.Runtime.InteropServices; using System.Threading; using System.Threading.Tasks; using System.Windows; namespace WpfApp198 { /// <summary> /// Interaction logic for App.xaml /// </summary> public partial class App : Application { [DllImport("user32", CharSet = CharSet.Unicode)] static extern IntPtr FindWindow(string cls, string win); [DllImport("user32")] static extern IntPtr SetForegroundWindow(IntPtr hWnd); [DllImport("user32")] static extern bool IsIconic(IntPtr hWnd); [DllImport("user32")] static extern bool OpenIcon(IntPtr hWnd); protected override void OnStartup(StartupEventArgs e) { bool isNew; var mutex = new Mutex(true, "MySingleInstanceMtx", out isNew); if(!isNew) { ActivateOtherWindow(); Shutdown(); } } private static void ActivateOtherWindow() { var other = FindWindow(null, "Single Instance"); if(other!=IntPtr.Zero) { SetForegroundWindow(other); if(IsIconic(other)) { OpenIcon(other); } } } } }
标签:IntPtr,via,DllImport,System,instance,other,static,using,WPF From: https://www.cnblogs.com/Fred1987/p/18288610