Gets or sets the height of the page, in text rows.
![](../icons/collapse_all.gif)
![](../icons/collapse_all.gif)
This value is valid on all IPageMessage instances created using the IMessageFactory interface, however it may be undefined (and hence have a value of -1) on instances received by an implementation of ISubscriptionListener.
The first character on a page is at row zero. Therefore the maximum modifiable column is at row (Height - 1).