When IsModal="true", Flyout will act as a modal window. The page will be disabled with a dimmed background and only the flyout will be available.
Notes on using IsModal property
- Set CloseEvent="NONE" to prevent Flyout from closing immediately.
- Set zIndex to a large number to make sure modal background is above all other elements on the page.
- You may use PageOpacity and PageColor to control background's opacity and color.