This document describes how to quickly integrate the Tencent Cloud IM SDK into your projects. Follow these steps to integrate the SDK easily.

Development Environment Requirements

• Operating system: Windows 7 or later
• Development environment: Visual Studio 2010 or later. Visual Studio 2015 is recommended.

Integrating the IM SDK

The following section describes how to integrate the SDK into a Visual Studio 2015 project by creating a simple MFC project.

Step 1. Download the IM SDK

Download the Windows IM SDK from Github.

Download and decompress the IM SDK file, which contains the following:

Step 2. Create a project

Open Visual Studio and create an MFC application named IMDemo.

For quick integration, on the Application Type page of the wizard, select the simple Dialog-based type. Do not change the defaults of other wizard configuration items.

Step 3. Copy files

Decompress and copy the IM SDK file to the directory where IMDemo.vcxproj is located:

Step 4. Modify the project configuration

The IM SDK provides two compiled static libraries, Debug and Release, which require some special configurations. To do this, go to the IMDemo property page by choosing Solution Resource Manager > right-click menu of the IMDemo project > Properties.

By using 32-bit Debug mode as an example, configure the project as follows:

1. Add the inclusion directory
   Navigate to C/C++ > General > Additional Inclusion Directories, and add the IM SDK header file directory $(ProjectDir)ImSDK\includes.

2. Add the library directory
   Navigate to Linker > General > Additional Library Directories, and add the IM SDK library directory $(ProjectDir)ImSDK\lib\Win32\Debug.

3. Add the library file
   Navigate to Linker > Input > Additional Dependencies, add the IM SDK library file imsdk.lib.

4. Copy the DLL file to the execution directory
   Navigate to Build Events > Pre-Built Events > Command Line, and then run xcopy /E /Y "$(ProjectDir)ImSDK\lib\Win32\Debug" "$(OutDir)" to copy the dynamic library file imsdk.dll to the application generation directory.

5. Specify the encoding format of the source file
   The IM SDK header file uses the UTF-8 encoding format, whereas some compilers compile source files in the default system encoding format. This may incur compilation failure. Set this parameter to instruct compilers to compile source files by using UTF-8 encoding.
   Navigate to C/C++ > Command Line > Additional Options, and enter /source-charset:.65001.

The Release mode is configured as follows:

1. Add the library directory
   Navigate to Linker > General > Additional Library Directory, and add the IM SDK library directory $(ProjectDir)ImSDK\lib\Win32\Release.
2. Copy the DLL file to the execution directory
   Navigate to Build Events > Pre-Built Events > Command Line, and run xcopy /E /Y "$(ProjectDir)ImSDK\lib\Win32\Release" "$(OutDir)" to copy the dynamic library file imsdk.dll to the application generation directory.

The settings for 64-bit Debug/Release and 32-bit are similar, but their library directories of the IM SDK are different, as shown below:

1. Add the library directory
   • For the Debug mode: navigate to Linker > General > Additional Library Directories, and add the IM SDK library directory $(ProjectDir)ImSDK\lib\Win64\Debug.
   • For the Release mode: navigate to Linker > General > Additional Library Directories, and add the IM SDK library directory $(ProjectDir)ImSDK\lib\Win64\Release.
2. Copy the DLL file to the execution directory
   • For the Debug mode: navigate to Build Events > Pre-Built Events > Command Line, and run xcopy /E /Y "$(ProjectDir)ImSDK\lib\Win64\Debug" "$(OutDir)" to copy the dynamic library file imsdk.dll to the application generation directory.
   • For the Release mode: navigate to Build Events > Pre-Built Events > Command Line, and run xcopy /E /Y "$(ProjectDir)ImSDK\lib\Win64\Release" "$(OutDir)" to copy the dynamic library file imsdk.dll to the application generation directory.

Step 5. Print the IM SDK version number

• In the IMDemo.cpp file, add the inclusion header file:

  #include "TIMCloud.h"

• In the CIMDemoDlg::OnInitDialog function, add the following test code:

  std::string version = TIMGetSDKVersion();
  CString szText;
  szText.Format(L"SDK version: %hs", version.c_str());
  CWnd* pStatic = GetDlgItem(IDC_STATIC);
  pStatic->SetWindowTextW(szText);

• Press F5 to run the code and print the IM SDK version number.

FAQs

• If the following error occurs, check whether the directory of the IM SDK header file has been correctly added according to the preceding project configuration:

  fatal error C1083: failed to open the inclusion file: “TIMCloud.h”: No such file or directory

• If the following error occurs, check whether the IM SDK library directory and library file have been correctly added according to the preceding project configuration:

  LINK : fatal error LNK1104: failed to open the file "imsdk.lib"

  error LNK2019: failed to parse the external symbol __imp__TIMGetSDKVersion, this symbol is referenced in "protected: virtual int __thiscall CIMDemoDlg::OnInitDialog(void)" (?OnInitDialog@CIMDemoDlg@@MAEHXZ)

• If the following error occurs, check whether the DLL file of the IM SDK has been copied to the execution directory according to the preceding project configuration: