[Solved] How to set NAV_WAYPOINT using MAVLink?

Hi,

I am developing My Customize GCS.
Lang is Delphi and based in this code.
And I’m writing a lot of new code.

I written a few reading function and procedure.
it’s working.
But I don’t know set it up params.

for exam, when I set Waypoint, I don’t know sending NAV_WAYPOINT.
What is the MSG_ID at this time?
I read this link but I don’t show MSG_ID.

Can you describe the MSG_ID?

39
http://mavlink.org/messages/common#MISSION_ITEM
For waypoint control, see this: https://mavlink.io/en/protocol/mission.html

Umm…

I think…

MISSION_ITEM
MISSION_REQUEST
MISSION_COUNT

3 word other flow tag is MSG_ID, right?
This was a really stupid question.
Thank you very much for your reply!