Solved

Building DLL from .LIB & .H

Posted on 2004-10-11
6
743 Views
Last Modified: 2008-01-09
SUMMARY
------------
I need the detailed steps of building a DLL project from .LIB & .H files using VC++ 6.0


DETAILES
-----------
I have Windows XP SP2 and I have installed Platform SDK in order to get the ibrary files to use in my Bluetooth application that will be developed in VC#.NET. The files are "irprops.lib" and "BluetoothAPIs.h" as mentioned at the end of this page:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/bluetooth/bluetooth/bluetoothauthenticatedevice.asp

The two files (irprops.lib & bluetoothAPI.h) downlodable at http://www.mybestserver.com/download/bluetooth_lib.zip.

I don't know how to use them in VC#.NET. It can deal with .DLL files only.

1) Please check the attached .LIB file. Does it contain the implelmenations of the functions listed in this link?
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/bluetooth/bluetooth/bluetooth_functions.asp

2) Does the file "irprops.lib" refere to other DLLs that I can use directly without the need to "irprops.lib" itself?

3) If I can develop a DLL project from th given files (irprops.lib & bluetoothAPI.h) then send me the detailed steps of doing so using VC++ 6.0 as I am not VC++ programmer.
0
Comment
Question by:f_asmaa
  • 3
  • 2
6 Comments
 
LVL 13

Expert Comment

by:SteH
ID: 12277754
In order to use functions from a DLL you need to include the .lib file at the linking stage. Either add it to the project or add it to the project settings on the linking tab.

And in each code file you want to use functions from that DLL you need to include the header:
#include "BluetoothAPI.h"

That should be it.
0
 
LVL 86

Accepted Solution

by:
jkr earned 250 total points
ID: 12277828
Actually, the DLL you are referring to already exists, it's part of the runtime environment. Do a

dumpbin /exports *.dll > exports.txt

in the system32 directory and locate which DLL exports these APIs.
0
 

Author Comment

by:f_asmaa
ID: 12278155
Dear jkr

1) What does dumpbin exactly do? Whn I run it I got the following error message
"This application has failed to start because mspdb60.dll was not found. Re-installing the application may fix this problem"

2) You told me that the already exists! Which dll and where can I find it?
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 86

Expert Comment

by:jkr
ID: 12278221
>>What does dumpbin exactly do?

It lists the functions exported from DLLs and will help ypu find which DLL actually exports these Bluetooth functions. a .lib file only establishes the 'link' between the functions you want to use and the DLL file they reside in, so creating an additional DLL will only introduce overhead.

>>You told me that the already exists! Which dll and where can I find it?

That I don't know from the top of my head and that's where. 'mspdb60.dll' usually resides in 'Common\MsDev98\bin' under your VC6 installation. I assume that your PATH environment not set up correctly.

0
 

Author Comment

by:f_asmaa
ID: 12285574
Dear jkr,

When I run the dumpbin command on "Irprops.LIB", I get the following result. How can I use these results to get the DLL to use in VS.NET?

-------------------------------------- dumpbin /exports Irprops.lib --------------------------------------

Microsoft (R) COFF Binary File Dumper Version 6.00.8447
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.


Dump of file irprops.lib

File Type: LIBRARY

     Exports

       ordinal    name

                  _BluetoothAuthenticateDevice@20
                  _BluetoothAuthenticateMultipleDevices@16
                  _BluetoothAuthenticationAgent@16
                  _BluetoothDisconnectDevice@8
                  _BluetoothDisplayDeviceProperties@8
                  _BluetoothEnableDiscovery@8
                  _BluetoothEnableIncomingConnections@8
                  _BluetoothEnumerateInstalledServices@16
                  _BluetoothFindBrowseGroupClose@4
                  _BluetoothFindClassIdClose@4
                  _BluetoothFindDeviceClose@4
                  _BluetoothFindFirstBrowseGroup@8
                  _BluetoothFindFirstClassId@8
                  _BluetoothFindFirstDevice@8
                  _BluetoothFindFirstProfileDescriptor@8
                  _BluetoothFindFirstProtocolDescriptorStack@8
                  _BluetoothFindFirstProtocolEntry@8
                  _BluetoothFindFirstRadio@8
                  _BluetoothFindFirstService@8
                  _BluetoothFindNextBrowseGroup@8
                  _BluetoothFindNextClassId@8
                  _BluetoothFindNextDevice@8
                  _BluetoothFindNextProfileDescriptor@8
                  _BluetoothFindNextProtocolDescriptorStack@8
                  _BluetoothFindNextProtocolEntry@8
                  _BluetoothFindNextRadio@8
                  _BluetoothFindNextService@8
                  _BluetoothFindProfileDescriptorClose@4
                  _BluetoothFindProtocolDescriptorStackClose@4
                  _BluetoothFindProtocolEntryClose@4
                  _BluetoothFindRadioClose@4
                  _BluetoothFindServiceClose@4
                  _BluetoothGetDeviceInfo@8
                  _BluetoothGetRadioInfo@8
                  _BluetoothIsConnectable@4
                  _BluetoothIsDiscoverable@4
                  _BluetoothMapClassOfDeviceToImageIndex@4
                  _BluetoothMapClassOfDeviceToString@4
                  _BluetoothRegisterForAuthentication@16
                  _BluetoothRemoveDevice@4
                  _BluetoothSdpEnumAttributes@16
                  _BluetoothSdpGetAttributeValue@16
                  _BluetoothSdpGetContainerElementData@16
                  _BluetoothSdpGetElementData@12
                  _BluetoothSdpGetString@24
                  _BluetoothSelectDevices@4
                  _BluetoothSelectDevicesFree@4
                  _BluetoothSendAuthenticationResponse@12
                  _BluetoothSetServiceState@16
                  _BluetoothUnregisterAuthentication@4
                  _BluetoothUpdateDeviceRecord@4
                  _CPlApplet@16

  Summary

          C6 .debug$S
          14 .idata$2
          14 .idata$3
           4 .idata$4
           4 .idata$5
           C .idata$6
0
 
LVL 86

Expert Comment

by:jkr
ID: 12288859
>>When I run the dumpbin command on "Irprops.LIB"

That will not help. As I wrote, use

dumpbin /exports *.dll > exports.txt

in the system32 directory and locate which DLL exports these APIs in the resulting text file 'exports.txt'.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
Often, when implementing a feature, you won't know how certain events should be handled at the point where they occur and you'd rather defer to the user of your function or class. For example, a XML parser will extract a tag from the source code, wh…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now