OLEContainer.DesignMode
From Xojo Documentation
Property (As Boolean )
aOLEContainer.DesignMode = newBooleanValue
or
BooleanValue = aOLEContainer.DesignMode
Supported for all project types and targets.
or
BooleanValue = aOLEContainer.DesignMode
Supported for all project types and targets.
Indicates whether the container is in Design Mode.