How add Delphi XE2 64bit support to a simple Delphi XE2 32bit VCL component?

If you mean "install it into the IDE", the simple answer is that you cannot The IDE is a 32-bit application and is not designed to host 64-bit DLL's. Any components or plug-ins must be compiled for 32-bit in order to work with the IDE itself 64-bit support in a component is for runtime support only, not design-time.

If you mean "install it into the IDE", the simple answer is that you cannot. The IDE is a 32-bit application and is not designed to host 64-bit DLL's. Any components or plug-ins must be compiled for 32-bit in order to work with the IDE itself.64-bit support in a component is for runtime support only, not design-time.

3 +1 I'd not even considered this particular nuance with respect to packages. I guess it's pretty unlikely that you'd ever feel the need to run the design time code under 64 bit. – David Heffernan Oct 10 at 22:32 You would not be able to, since the IDE itself is 32-bit, so it cannot run 64-bit code at all.

Debugging 64-bit runtime code, on the other hand, is done by running the remote debugger on a 64-bit machine and connecting to it with the IDE. – Remy Lebeau - TeamB Oct 11 at 0:06.

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