value = "string"; 

Specifies the initial value of a tile. Possible value is a quoted string. The meaning of a tile's value varies depending on the kind of tile. The value of a tile can change at runtime through user input or set_tile calls.

The value attribute of a tile is not considered when the dialog box is laid out. After the layout is finished and the dialog box has been displayed, new_dialog uses the value attributes to initialize each tile in the dialog box. A tile's value attribute has no effect on the size or spacing of tiles in the dialog box.