PagePanel.LastAddedPanelIndex
From Xojo Documentation
Read-Only Property (As Integer )
IntegerValue = aPagePanel.LastAddedPanelIndex
New in 2019r2
Supported for all project types and targets.
New in 2019r2
Supported for all project types and targets.
The number of the last Panel added with the AddPanel or AddPanelAt methods. LastAddedPanelIndex is zero-based. If no panels have been added, LastAddedPanelIndex will be -1.