Flash 8.
fl.objectDrawingMode
Property; a Boolean value that specifies whether the object drawing mode is enabled (true) or the merge drawing mode is enabled (false).
The following example toggles the state of the object drawing mode:
var toggleMode = fl.objectDrawingMode;
if (toggleMode) {
fl.objectDrawingMode = false;
} else {
fl.objectDrawingMode = true;
}