Usage of #pragma comment in Visual C++ & C++/CLI

Adding the Pragma Directives  will tell the linker what additional input files are needed. The link will link the object files generated by the compiler and link them with the additional libraries to generate the ultimate module(.exe or .dll files).

This work can also be done in the properties dialog of the project. You can add the .lib files in the property below:

Configuration Properties -> Linker -> Input -> Additional Dependencies.

The input files will be part of the linker command in the end. Below is a simple sample shows how the input files are used in the link command:

link /dll a.obj b.lib c.lib

In short Places a comment record into an object file or executable file.

Syntax:

#pragma comment( comment-type [,"commentstring"] )

comment-type

1.compiler:Places the name and version number of the compiler in the object file

2. exestr:  At link time this string is placed in the executable file

3.lib:Places a library-search record in the object file. 

4.linker:Places a linker option in the object file.

5.user:Places a general comment in the object file

Examples:

#pragma comment( lib, "emapi" ) //lib comment-type

#pragma comment( compiler ) //compiler comment type

#pragma comment( user, "Compiled on " __DATE__ " at " __TIME__ )  //user comment type

For more reference see also:

http://msdn.microsoft.com/en-us/library/7f0aews7.aspx