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Asked: 2026-05-10T21:46:03+00:00

I have a Delphi application similar to Taskbar Shuffle that includes a hook dll.

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I have a Delphi application similar to Taskbar Shuffle that includes a hook dll.

EDIT: This hook DLL communicates with the main app by sending windows messages.

I want to add support to XP and Vista x64 and my initial idea was to convert the dll to 64-bit (compiling it with FreePascal) but keep the application 32-bit for now (Delphi).

Is it possible for a 32-bit application to access a 64-bit dll?

EDIT2: I’m loading the dll via LoadLibrary so I guess I’m stuck since a 32-bit process won’t be able to load a 64-bit dll, according with what I read on the link pointed by Lars Truijens on one of the answers below.

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1 Answer

  1. No. You’ll have to compile two versions: 64-bit and 32-bit.

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