How can I call a 32-bit DLL from 64-bit code?

Question

I have some 32-bit DLLs that don\'t have matched 64-bit DLLs. How can I invoke these DLLs from a 64-bit application written in Delphi XE2?

Answer 1

I had the same issue some time back and found this link:32-bit DLLs in 64-bit environment

The 32-bit DLL was written in Delphi, ages ago, and we now had a need to call it from a 64-bit platform- but we don't have a 64-bit Delphi.

I've made it work- though it seems a bit of a kludge, it was better than getting the DLL rewritten in 64-bit (we'd have had to purchase a 64-bit version of Delphi, or start from scratch in something else).

NB while this needs some hacking, no programming is required- it uses components that came with Windows. Works in (at least) Windows 7, Windows 2008.