ControlContext :: submitMessage - Submit message to user control
The function sends a text message to a user control. When the control associated with the control context is not a user control, the function does nothing. In order to obtain messages in a user control, the user control has to re-implement the UserControl ::message() function.
Messages (commands) processed by a user control are defined for each user control separately. Typically, a message contains a command and optional parameters:
command[:parm1;parm2...]
Parameters are separated by semicolon. When a parameter contains a semicolon, it has to be quoted ("..."). Quotes at beginning and end of a parameter string are removed.
//..fragment
field('user_control').setProperty(phVideo);
field('user_control').message('start animation:animation file');