From Xojo Documentation

Design Property (as Integer)
This Window property can only be set in the Inspector and is not available in code.

The window type. Set the desired Frame type in the Inspector.


Frame is set to one of the following values:

Value Class Constant
0 Document window
1 Movable Modal window
2 Modal Dialog box
3 Floating window
4 Plain box
5 Shadowed box
6 Rounded window
7 Global floating window
8 Sheet window (macOS only, displays as movable modal dialog on Windows/Linux)
9 Metal window (macOS only, although rarely used and deprecated by Apple)
10 Drawer window (No longer supported).
11 Modeless Dialog box (displayed as a Document window for OSs that do not have this concept)

The various frame types are covered in the User Guide.

See Also

Window class