Delphi 10.4 Debug

[c0d3r 17]

Could anyone know how to debug/trace into Delphi VCL source codes in Delphi 10.4?  I can debug and trace into all the 3rd party component source codes but couldn't do to Delphi VCLs (e.g. TCustomForm, TWinControl, TControl),  when tried to trace/step in, the CPU window pops up.

[Vincent Parrett 657]

Turn on Use Debug dcu's in the compiler options. This is usually enabled by default in the Debug config.  

[c0d3r 17]

1 hour ago, Vincent Parrett said:

Turn on Use Debug dcu's in the compiler options. This is usually enabled by default in the Debug config.  

Thank you. That works.