Add row to the log window

This should be easy

I want in the log window to add manually some rows, i mean, to be able to see in the log window:

[...]
extracting ... myfile1.xte
This is the essage i want to add
extracting...
Complete

How do i add that string? i mean, which is the order to insert a row in the log?

Thanks again

DetailPrint "This is the essage i want to add"

To put it into context:

Section "Some Files"

   File myfile.txt

   DetailPrint "This is the essage i want to add" 

   File yourfile.txt

SectionEnd

thanks 😉