Debugging a DLL

Problem/Question/Abstract:

Debugging a DLL

Answer:

This is done by setting a host application and choosing Delphi 5 (delphi32.exe) itself as the host application. Theoretically very easy - available since Delphi 3.
But there are two catches:

It seems that

the DLL has to be in the same directory as its DPR file (in other words: don't have a separate output directory)

your project path should not contain directories with a space in the name. There seems to be a problem with debugging DLL's with spaces in the project path.