🚀 go-pugleaf

Hi,
I have a form where there are at least two controls in no parent/owner -
child relationship.
It's about a TDBGrid and a TDateTimePicker.
The quest is to drop the TDateTimePicker drop-down list in a programmatic
way.
More specific: when an event of type OnKeydown occurs at the TDBGrid level,
this should force the drop-down list of TDateTimePicker control to drop.

I thought of sending a message to TDateTimePicker control across
"SendMessage" but there are some questions:
1. What value should have the fourth parameter (lParam) of SendMessage in
order to "inform" the control that Alt key is pressed
2. Is it enough to send below message in order to have the drop-down list
dropped:
    "SendMessage(lDateTimePicker.Handle, WM_CHAR, word(Key), 0);"?

I should add that this happens in an OnKeyDown event.

I'd be grateful to anyone who will suggest a better way!
Mike