How to Create a .lib File from a .dll and Header in Visual Studio?

Creating .lib File from .dll and Header in Visual Studio

To access existing .dll routines in your Visual Studio application, you need to create a .lib file.

Step-by-Step Instructions:

1. Use the DUMPBIN tool:

   • Open a command prompt as administrator.
   • Navigate to the directory containing your .dll file.
   • Enter the following command: DUMPBIN /EXPORTS "yourfile.dll" > "yourfile.exports"
   • This will generate a file called "yourfile.exports" containing the exported functions in the .dll.

2. Create a .def file:

   • Open a text editor and create a new file named "yourfile.def".
   • At the top of the file, add the line: EXPORTS
   • Copy the exported function names from "yourfile.exports" and paste them into the .def file.

3. Build the .lib file:

   • Open a Visual Studio command prompt as administrator.
   • Navigate to the Visual C bin directory (e.g., C:Program Files (x86)Microsoft Visual Studio 14.0VCbin).
   • If you need a 64-bit .lib file, use: lib /def:"yourfile.def" /machine:x64 /out:"yourfile64.lib"
   • Otherwise, use: lib /def:"yourfile.def" /out:"yourfile.lib"
   • This will create a .lib file named "yourfile.lib" or "yourfile64.lib" containing the necessary import information.

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