How to Create a .LIB File from a .DLL and a Header File?

Creating a .LIB File from a .DLL and a Header

To incorporate an existing .DLL into your project, you'll need to create a .LIB file. Here's a step-by-step guide:

Step 1: Export Function Names

Begin by extracting the exported function names from the .DLL using DUMPBIN:

dumplin /EXPORTS yourfile.dll > yourfile.exports

Step 2: Create a .DEF File

a. Open a new text file named yourfile.def.
b. Add the following line to the top:

EXPORTS

c. Copy the exported function names from yourfile.exports into this file, separating each with a carriage return.

Step 3: Compile the .DEF File

a. Open a command prompt and navigate to the Visual C bin directory.
b. Run the following command to compile the .DEF file into a .LIB file:

lib /def:yourfile.def /out:yourfile.lib

Note: For x64 builds, use the following command:

lib /def:yourfile.def /machine:x64 /out:yourfile64.lib

Step 4: Check Results

After compilation, you should have the following files:

• yourfile.lib
• yourfile.exp

Your .LIB file can now be referenced in your project, allowing you to call functions from the .DLL.

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