Explain what is wrong here ?????

procedure tform8.tmr1timer (sender: tobject);
Begin.
 ...
 Application.MessageBox ('My message.' '); // [Error] Unit8.pas (38): Not Enough Actual Parameters
end;

Answer 1, Authority 100%

TapPplication.MessageBox method in Delphi has the kind of

function messagebox (Const Text: Pchar; Const Caption: Pchar; flags: longint = mb_ok): integer;

on your “photo” is difficult to see anything, but the set of parameters when the call clearly does not correspond to the description of the method. What, by the way, the mistake in the first picture says.