我该怎么办呢？电脑显示找了新硬件，utstarcom dc200 modem 但我装不 了驱动。
是不是根本就没有COM2 这个硬件接口。看看你自己电脑有哪个端口就开启哪个
'System.Windows.Forms.Button' does not contain a definition 'System.Xml.XmlException' occurred in System.Xml.dll Visual C#? 'Transaction failed. The server response was: 5.7.1 Relay access denied in asp.net' 'Windows' does not exist in the namespace 'System'... "_" underscore keyword in...
公开他们的应用程序和设备之间进行通信的 COM 端口的 USB 设备使用收件箱 Usbser.sys Windows 8.1、 Windows Server 2012 R2,Windows 7 或 Windows Server 2008 R2 中创建虚拟 COM 端口。如果此类设备中移除,然后重新快速插入它可能未被重新发现正确,以及 COM 端口,如 COM3,可能无法...
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Debugging Tools for Windows supports kernel debugging of a virtual machine using a Virtual COM Port.
如果这是Windows操作系统，那么尝试将COM端口名指定为\.\COM 11
I'm not sure that this is a VB development issue though...Reed Kimble - "When you do things right, people won't be sure you've done anything at all"Thursday, May 30, 2013 10:43 PMAre you referring to the serial port using the serial port name that you observe in somewhere like ...
Windows Server 2012 R2, Windows 7, or Windows Server 2008 R2. If such a device is removed and then reinserted quickly, it may not be rediscovered correctly, and the COM port, such as COM3, may not be re-created. Additionally, you may receive an ...