TIdIMAP4.SendCmd

[Boba TC]

Dear All; here's an easy one:
trying to SearchMailBox like this:

Code:

TIdIMAP4SearchRec sr;
::ZeroMemory(&sr, sizeof(sr));
sr.Date = TDateTime::CurrentDate()-2;
sr.SearchKey = skSince;
if(IdIMAP4->SearchMailBox(&sr, 0)){
  //...
}

and this is what the log.file shows:

Code:

...
C4 OK [READ-ONLY] Inbox selected. (Success)<EOL>
C5 SEARCH SINCE  8-JUL-2018<EOL>
C5 BAD Could not parse command<EOL>
...

I bet I've seen similar topics back when Borland news groups were alive; so what's wrong with my code?
Should I use IdIMAP4->SendCmd() directly? I would if I knew its proper syntax. Thanks in advance.