CODEWITHSUNDEEP
c#.netdelphidllunmanaged
GregorM
GregorM

Reputation: 31

How can I call mixed mode C# dll from Delphi using BTMemoryModule?

I have a DLL written in C# that uses Robert Giesecke's UnmanagedExports library and exports functions with [DllExport].

I can load it fine with LoadLibrary, and call its exported functions. When I tried to load it into memory using BTMemoryModule, the call of entry point (DllMain - DLL_PROCESS_ATTACH) TDllEntryProc (in function BTMemoryLoadLibary) returns false. How can I load such a DLL using BTMemoryModule.

Upvotes: 1

Views: 199

Answers (1)

David Heffernan
David Heffernan

Reputation: 613302

Loading DLLs from memory is not unsupported. Any code that does this is using unsupported hacks to do so. The system provides LoadLibrary, LoadLibraryEx etc. to perform this task, and they require the DLL to be present on disk.

Your DLL is a mixed mode .net assembly, and it requires special treatment by the loader. The system loader, as invoked by calls to LoadLibrary, LoadLibraryEx etc. knows how to perform the actions needed to load a mixed mode .net assembly. The BTMemoryModule code does not perform these special actions.

If you are going to be able to load such a module from memory, you will need to either find a library that supports such modules, or write your own loader code. Frankly, I doubt that such a library exists. More realistically you should load the DLL from disk.

Upvotes: 1

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