How to Create a .dll to be used in other Projects

How to Create a .dll to be used in other Projects

• Faketone

  Awesome....Really appreciate...I have a question which is all related...thats where it all started from....

  BBDEVMGRLib is an .exe which I add as a refrence......It adds fine no problem.....they gave a C++ Code with it....which is done as you have done above but is not managed code....

  enum{ READ_EVENT, CLOSE_EVENT, NUM_EVENTS};

  class USBClient:

  public IChannelEvents //implements the ICHannelEvents interface in order to receive notifications on the connection to the device

  {

  public:

  USBClient()

  {

  }

  ~USBClient()

  {}

  public :

  int run()

  {

  //create some events for listening for notifications from the device

  _events[READ_EVENT] = CreateEvent(NULL, FALSE, FALSE, NULL); //unnamed

  _events[CLOSE_EVENT] = CreateEvent(NULL, TRUE, FALSE, NULL); //unnamed

  if( _events[READ_EVENT] == INVALID_HANDLE_VALUE || _events[CLOSE_EVENT] == INVALID_HANDLE_VALUE ) {

  return false;

  }

  public:

  //implementation of the IChannelEvents interface

  virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, void **ppvObject )

  {

  if ( riid == IID_IChannelEvents || riid == IID_IUnknown) {

  *ppvObject = (IChannelEvents*)this;

  AddRef();

  return 0;

  }

  return E_NOINTERFACE;

  }

  virtual ULONG STDMETHODCALLTYPE AddRef()

  {

  return ++_refcount;

  }

  virtual ULONG STDMETHODCALLTYPE Release()

  {

  ULONG count = --_refcount;

  if ( count == 0 )

  {

  delete this;

  }

  return count;

  }

  virtual HRESULT STDMETHODCALLTYPE raw_CheckClientStatus( void )

  {

  return 0; //not implemented

  }

  private:

  //data members

  IChannelPtr _channel;

  ULONG _refcount;

  HANDLE _events[NUM_EVENTS];

  };

  Then in the run code above we try to open channel, by passing these events...I was trying to do this code in C#.......I found no way to change this code in C#.......Do you have any ideas to do that.....

  This is my first time working with USB....and managed code......

  Thanks a lot......

  Harsimrat

  
  

• JoeyBlow

  Ironically there is no documentation......only the code they provide with it.....

  I can get you the code and .exe file or you can download from here....You can download the v4.1...

  http://www.blackberry.net/products/software/desktop/

  Then after installing ProgramFiles/Common/Research IN Motion/USB/

  Alternatively my email address is (thukral.harsimrat at gmail.eraseme.com). I can send you the .exe file and related stuff...

  I really appreciate for your help.....

  Thanks a ton...

  Harsimrat

  
  

• Werdna1

  Harsimrat wrote:

  Awesome....Really appreciate...I have a question which is all related...thats where it all started from.... BBDEVMGRLib is an .exe which I add as a refrence......It adds fine no problem.....they gave a C++ Code with it....which is done as you have done above but is not managed code.... enum{ READ_EVENT, CLOSE_EVENT, NUM_EVENTS}; class USBClient: public IChannelEvents //implements the ICHannelEvents interface in order to receive notifications on the connection to the device { public: USBClient() { } ~USBClient() {} public : int run() { //create some events for listening for notifications from the device _events[READ_EVENT] = CreateEvent(NULL, FALSE, FALSE, NULL); //unnamed _events[CLOSE_EVENT] = CreateEvent(NULL, TRUE, FALSE, NULL); //unnamed if( _events[READ_EVENT] == INVALID_HANDLE_VALUE || _events[CLOSE_EVENT] == INVALID_HANDLE_VALUE ) { return false; } public: //implementation of the IChannelEvents interface virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, void **ppvObject ) { if ( riid == IID_IChannelEvents || riid == IID_IUnknown) { *ppvObject = (IChannelEvents*)this; AddRef(); return 0; } return E_NOINTERFACE; } virtual ULONG STDMETHODCALLTYPE AddRef() { return ++_refcount; } virtual ULONG STDMETHODCALLTYPE Release() { ULONG count = --_refcount; if ( count == 0 ) { delete this; } return count; } virtual HRESULT STDMETHODCALLTYPE raw_CheckClientStatus( void ) { return 0; //not implemented } private: //data members IChannelPtr _channel; ULONG _refcount; HANDLE _events[NUM_EVENTS]; }; Then in the run code above we try to open channel, by passing these events...I was trying to do this code in C#.......I found no way to change this code in C#.......Do you have any ideas to do that..... This is my first time working with USB....and managed code...... Thanks a lot...... Harsimrat

  This seems to be the source code to a thin COM wrapper of IChannelEvents (for some reason it is using the pimpl idiom to wrap IChannelPtr (comes from the #import directive). This is unmanaged C++ (not .NET).

  Note that in C#, you program COM classes differently.

  Inside the BBDEVMGRLib namespace, there should be COM classes you have to instantiate in C# before you can use its methods. The way to access those classes (in C#) should be something like:

  BBDEVMGRLib.IChannelClass channel =
  new BBDEVMGRLib.IChannelClass();
  channel.CheckClientStatus();

  But from your reply, it sounds like you lack knowledge on programming COM in C#. If this is so, you should start off programming some simpler COM classes (like the Office programming tutorials, or the shell).

  
  
  

• Vinay Bhat MSFT

  Sorry, that was pseudo code too .

  As I don't have the USB SDK you mentioned, I have no idea myself how to program BBDevMgrLib. If I had access to the tlb or exe that the vendor provides, I may be able to give you more suitable code. But right now, I don't what IChannelEvents, IChannel are, let alone give you decent code that describes them.

  Is there an online document somewhere that describes what these interfaces are, and how to use them

  
  
  

• Jenska

  Anyone, any suggestions.....
  

• Kate E

  Since you are writing a managed class, use an IntPtr where you are currently using a HANDLE. And when you want to convert that to a HANDLE, use ToPointer on the IntPtr and do a cast to HANDLE.
  
  

• Daniel Penalba

  if you can give me an example on that..Really appreciate...
  

• JMäkitalo

  I hear you there , and I don't deny that fact, I was just working on some project which requires USB connection....

  Thanks,

  harsimrat

  
  

• Moshfegh

  VC++ 2005, I can use VC 2003 I have all the Versions.......
  

• PatrickR

  Take a look at http://msdn2.microsoft.com/en-us/library/sd10k43k.aspx for interoperation and mixing native to managed code. One way, is to wrap your C++ code in managed wrappers and use the resulting managed binary in your C# application.

  Also, take a look at http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=73716&SiteID=1 where you can find a simple example of using Managed VC++ code in C# applications.

  Thanks,

  Ayman Shoukry

  VC++ Team

  
  
  

• Brahim H

  Hello Ayman,

  I have code something like this...

  #pragma once

  using namespace System;

  using namespace BBDEVMGRLib;

  enum { READ_EVENT, CLOSE_EVENT, NUM_EVENT};

  namespace USB

  {

  __gc class USBClient: public IChannelEvents

  {

  public:

  USBClient()

  {

  }

  ~USBClient()

  {}

  private:

  HANDLE client[NUM_EVENT];

  };

  }

  It doesnt pick HANDLE......It tells me to give __gc or __nogc but when i do that...it has a problem....

  I have done anything like this before...any help really appreciated....

  
  

• Jean-Jacques Borie

  As per the code above...

  using BBDEVMGRLib;

  then

  public void USB()

  {

  IChannelEvents channel = null;

  channel.CheckClientStatus();

  }

  Then Error ...

  Object reference not set to an instance of an object

  I know there will be an error here....but I dont understand what it should refer too.....

  Then I tried doing something....

  IChannel _ch;

  _ch = channel.CheckClientStatus();

  Error 1 Cannot implicitly convert type 'void' to 'BBDEVMGRLib.IChannel'
  

  Any ideas...Sorry for being a bugger.....

  
  

• Rob Redford

  Harsimrat wrote:

  if you can give me an example on that..Really appreciate...

  Okay, but first, are you using VC++ 2003 or VC++ 2005

  
  
  

• KoeiTG

  In VC++2005 that would be

  #pragma once

  using namespace System;
  using namespace BBDEVMGRLib;

  namespace USB
  {

  enum { READ_EVENT, CLOSE_EVENT, NUM_EVENT};

  ref class USBClient: public IChannelEvents
  {
  public:

    USBClient() : client(gcnew cli::array<IntPtr>(NUM_EVENTS))
    {

    }

    /// <summary>
    /// Example code you should use in C# (CAUTION: pseudocode only)...
    /// usbClient.DoWorkWithNthHandle(CLOSE_EVENT);
    /// </summary>
    void DoWorkWithNthHandle(int n)
    {
      SignalHandle(this->client[ n ].ToPointer());
    }

    ~USBClient()
    {
    }

  private:
   cli::array<IntPtr> ^client;
  };

  }

  
  
  
• How to Create a .dll to be used in other Projects