DllNotFoundException

Questions & Answers
1

I created a C++ plugin for Unity and I tried to use it in my game. After having compiled everything on both ends and then copying and pasting the .dll file into my Unity project's "Plugins" folder, I then ran the game and when the function was called the following error was thrown:

Assets/Scripts/C#/Player.cs:73)

Assets/Scripts/C#/Player.cs:73)> DllNotFoundException:

PhysicsEngine.dll AssaultRifle.FireShot () (at Assets/Scripts/C#/AssaultRifle.cs:217) AssaultRifle+c__Iterator1.MoveNext () (at Assets/Scripts/C#/AssaultRifle.cs:151) UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator) Player:GetInput() (at Assets/Scripts/C#/Player.cs:73)Assets/Scripts/C#/Player.cs:73)

Assets/Scripts/C#/Player.cs:73)

The code that I wrote for the C++ is shown in the following:

extern "C"
{
...
    const EXPORT_API char* HelloWorld()
    {
        return "Hello World!  ^_^ 
";
    }

For the C# file, I have the following:

public class AssaultRifle:Weapon
{
    [DllImport("PhysicsEngine")]
    private static extern string HelloWorld();
...
    private void FireShot()
    {
        print(HelloWorld());

If there's anyone who's had this kind of experience with trying to import C++ plugins into Unity and know how to solve this problem, then please let me know. I really have no idea how to resolve this problem right now. Thanks in advanced.

2

Remove .dll from the DllImport, it should just be the library's name instead