A label is not a true command. However, it is used as the beginning of any routine that is called by Goto, Gosub and object Events, etc. A label is defined as a string terminated by a colon (:). A sample label might be:
It does not have to start at the beginning of the line, however, it does have to be the first item on the line. You can have a regular command after the label if desired.
There is a special type of label that is used for object Events. In this case the label starts with the object name, a period (.), and the event name. So, in the case of a button where the TButton's Name property is btnOK, the CLICK Event would be:
For more information about object Events please refer to the specific object.
During compilation, if a label is referred but not defined you will receive an error to that effect and the process will not complete.