VC 2008，电脑上可用的所有串口号的获取，测试可用.zip

/* Module : enumser.cpp Purpose: Implementation for a class to enumerate the serial ports installed on a PC using a number of different approaches. Created: PJN / 03-10-1998 History: PJN / 23-02-1999 Code now uses QueryDosDevice if running on NT to determine which serial ports are available. This avoids having to open the ports at all. It should operate a lot faster in addition. PJN / 12-12-1999 Fixed a problem in the Win9x code path when trying to detect deactivated IRDA-ports. When trying to open those, you will get the error-code ERROR_GEN_FAILURE.� PJN / 17-05-2000 Code now uses GetDefaultCommConfig in all cases to detect the ports. PJN / 29-03-2001 1. Reverted code to use CreateFile or QueryDosDevice as it is much faster than using the GetDefaultCommConfig method 2. Updated copyright message PJN / 25-06-2001 1. Guess what, You now have the choice of using the GetDefaultCommConfig thro the use of three versions of the function. You take your pick. 2. Fixed problem where port fails to be reported thro the CreateFile mechanism when the error code is ERROR_SHARING_VIOLATION i.e. someone has the port already open PJN / 11-08-2001 1. Made code path which uses QueryDosDevice more robust by checking to make sure the device name is of the form "COMxyz.." where xyz are numeric PJN / 13-08-2001 1. Made the code in IsNumeric more robust when sent an empty string 2. Optimized the code in EnumerateSerialPorts2 somewhat. Thanks to Dennis Lim for these suggestions. PJN / 22-05-2003 1. Updated copyright details. 2. Addition of a "EnumerateSerialPorts4" which uses Device Manager API PJN / 20-09-2003 1. Addition of a "EnumerateSerialPorts5" method. This method (hopefully the last method!) uses EnumPorts and was provided by Andi Martin. PJN / 12-12-2003 1. Updated the sample app to VC 6. 2. Addition of a "EnumerateSerialPorts6" (See Note 4 below) which uses WMI. 3. You can now optionally exclude each function using preprocessor defines of the form "NO_ENUMSERIAL_USING_XYX". 4. Made the functions members of a C++ class and renamed them to use more meaningful names PJN / 13-05-2004 1. Extended CEnumerateSerial::UsingSetupAPI to now also return the friendly name of the port. Thanks to Jay C. Howard for prompting this update. PJN / 08-07-2006 1. Updated copyright details. 2. Addition of a CENUMERATESERIAL_EXT_CLASS macro to allow the code to be easily added to an extension dll. 3. Code now uses newer C++ style casts instead of C style casts. 4. Updated the code to clean compile on VC 2005. 5. Updated the documentation to use the same style as the web site. PJN / 08-11-2006 1. Extended CEnumerateSerial::UsingWMI to now also return the friendly name of the port. Thanks to Giovanni Bajo for providing this update. 2. Fixed a bug where CEnumerateSerial::UsingSetupAPI forget to empty out the Friendly name array on start. 3. VariantInit is now called for the 2 VARIANT structs used in the UsingWMI method code. PJN / 29-01-2007 1. Updated copyright details. 2. UsingSetupAPI code now uses the GUID_DEVINTERFACE_COMPORT guid to enumerate COM ports. Thanks to David McMinn for reporting this nice addition. 3. Detection code which uses CreateFile call, now treats the error code of ERROR_SEM_TIMEOUT as indication that a port is present. PJN / 09-06-2007 1. Following feedback from John Miles, it looks like my previous change of the 29 January 2007 to use GUID_DEVINTERFACE_COMPORT in the UsingSetupAPI method had the unintended consequence of causing this method not to work on any versions of Windows prior to Windows 2000. What I have now done is reinstate the old mechanism using the name UsingSetupAPI2 so that you can continue to use this approach if you need to support NT 4 and Windows 9x. The new approach of using GUID_DEVINTERFACE_COMPORT has been renamed to UsingSetupAPI1. PJN / 05-07-2007 1. Updated the code to work if the code does not include MFC. In this case, CUIntArray parameters becomes the ATL class CSimpleArray<UINT> and CStringArray parameters become the ATL class CSimpleArray<CString>. Please note that this support requires a recentish copy of Visual Studio and will not support Visual C++ 6.0 as the code makes use of the ATL CString class. Thanks to Michael Venus for prompting this update. 2. CEnumerateSerial::UsingWMI method now uses ATL smart pointers to improve robustness of the code. PJN / 20-03-2008 1. Updated copyright details 2. Updates to preprocessor logic to correctly include UsingSetupAPI1 and UsingSetupAPI2 functionality 3. Updated sample app to clean compile on VC 2008 PJN / 23-11-2008 1. Updated code to compile correctly using _ATL_CSTRING_EXPLICIT_CONSTRUCTORS define 2. The code now only supports VC 2005 or later. 3. Code now compiles cleanly using Code Analysis (/analyze) 4. Yes, Addition of another method called "UsingComDB" to enumerate serial ports!. This function uses the so called "COM Database" functions which are part of the Windows DDK which device drivers can use to support claiming an unused port number when the device driver is being installed. Please note that the list returning from this function will only report used port numbers. The device may or may not be actually present, just that the associated port number is currently "claimed". Thanks to Dmitry Nikitin for prompting this very nice addition. The code now supports a total of 8 different ways to enumerate serial ports! PJN / 29-11-2008 1. Addition of a ninth and hopefully final method to enumerate serial ports. The function is called "UsingRegistry" and enumerates the ports by examining the registry location at HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM. Thanks to Martin Oberhuber for prompting this update. 2. Fixed a bug where the last error value was not being preserved in CEnumerateSerial::UsingComDB. PJN / 30-04-2009 1. Updated copyright details. 2. Updated the sample app's project settings to more modern default values.