| Name | Type | Description | Required | 
|---|
| Id | String | Unique identifier for the dialog. | Yes | 
| CustomPalette | YesNoType | Used to specify if pictures in the dialog box are rendered with a custom palette. |   | 
| ErrorDialog | YesNoType | Specifies this dialog as an error dialog. |   | 
| Height | Integer | The height of the dialog box in dialog units. | Yes | 
| Hidden | YesNoType | Used to hide the dialog. |   | 
| KeepModeless | YesNoType | Keep modeless dialogs alive when this dialog is created through DoAction. |   | 
| LeftScroll | YesNoType | Used to align the scroll bar on the left. |   | 
| Modeless | YesNoType | Used to set the dialog as modeless. |   | 
| NoMinimize | YesNoType | Used to specify if the dialog can be minimized. |   | 
| RightAligned | YesNoType | Align text on the right. |   | 
| RightToLeft | YesNoType | Used to specify if the text in the dialog should be displayed in right to left reading order. |   | 
| SystemModal | YesNoType | Used to set the dialog as system modal. |   | 
| Title | String | The title of the dialog box. |   | 
| TrackDiskSpace | YesNoType | Have the dialog periodically call the installer to check if available disk space has changed. |   | 
| Width | Integer | The width of the dialog box in dialog units. | Yes | 
| X | Integer | Horizontal placement of the dialog box as a percentage of screen width. The default value is 50. |   | 
| Y | Integer | Vertical placement of the dialog box as a percentage of screen height. The default value is 50. |   |