摘要：bool blFlag = false; Mutex mtx = new Mutex(false, "Form1", out blFlag); if (!blFlag) { MessageBox.Show("软件已启动"); Application.Exit(); } else { Applicat 阅读全文

摘要：public partial class Form2 : Form { public Form2() { InitializeComponent(); } string strPath = ""; private void button1_Click(object sender, EventArgs 阅读全文