How to use a dll outside of the system path

Question

I made an application that uses the openssl dlls (libeay32.dll and ssleay32.dll). It is indy using them, I don\'t call the dlls directly.

T

Answer 1

If you are using an up-to-date version of Indy 10, the IdSSLOpenSSLHeaders unit has a public IdOpenSSLSetLibPath() function to tell Indy which custom folder to look in for the OpenSSL DLLs:

procedure IdOpenSSLSetLibPath(const APath: String);

Answer 2

You can use SetDllDirectory to manipulate the DLL search order.

Answer 3

Load the DLLs yourself with LoadLibrary as soon as you have written them to the temp folder.
This will make Indy's LoadLibrary use your DLLs when they need them:

If lpFileName does not include a path and there is more than one loaded module with the same base name and extension, the function returns a handle to the module that was loaded first.