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VB Forum / COM / February 2005USB Detection and support
Hi!, I want to detect USB from my VB6 Application that has it's own user in windows 2000 (Professional). This user can only run that application and can not access explorer and start menu. I want to know how this can be done? Thanks, Fahim. What exactly do you mean, "I want to detect USB"? Do you want to know if 1. There is a USB bus? 2. There is a specific USB device? Marco ________________________ Marc Reinig UCO/Lick Observatory Laboratory for Adaptive Optics > Hi!, > I want to detect USB from my VB6 Application that has it's own user in [quoted text clipped - 5 lines] > Thanks, > Fahim. I want to detect USB device (Flash Drive specifically). > What exactly do you mean, "I want to detect USB"? > [quoted text clipped - 18 lines] > > Thanks, > > Fahim. Hi, You normally use whatever API is required for the specific hardware device that is attached to the USB port. There is no general-purpose driver for this. So, if you are connecting to a serial device, you use the Windows serial APIs. If a sound device, you use the MCI APIs. If a disk drive, you use the various file APIs. The actual driver that is installed when Windows detects the USB device translates these Windows APIs to the device specific commands required for the actual hardware. However, if you have custom built USB hardware, you need lower level access to the device. You must know A LOT about the hardware before this sort of thing is useful. I suggest that you get a copy of Jan Axelson's book, USB Complete, 2nd Edition. You can get information on it from the Books link on my homepage. If you just want to use a USB serial port adapter to connect to an RS-232 device, then you may use MSComm or any of the other serial communications methods that are described in detail in my book.  SignatureRichard Grier (Microsoft Visual Basic MVP) See www.hardandsoftware.net for contact information. Author of Visual Basic Programmer's Guide to Serial Communications, 4th Edition ISBN 1-890422-28-2 (391 pages) published July 2004. See www.mabry.com/vbpgser4 to order. |
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