public System.Windows.Forms.RichTextBox richTextBox1; public System.Windows.Forms.StatusStrip statusStrip1; public System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel1; public System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel2; public System.IO.Ports.SerialPort serialPort1; 已经是了 Form1 mm = new Form1(); mm.show(); 这样新显示的窗体是变化的,并不是原来的form1,感觉是两个form1了