Title: How to hide the application from tasklist (Ctrl+Alt+Del)
implementation
function RegisterServiceProcess(dwProcessID, dwType: DWORD): DWORD;
stdcall; external 'KERNEL32.DLL';
// hide
procedure TForm1.Button1Click(Sender: TObject);
begin
RegisterServiceProcess(GetCurrentProcessID, 1);
end;
// show again
procedure TForm1.Button2Click(Sender: TObject);
begin
RegisterServiceProcess(GetCurrentProcessID, 0);
end;