Enum which describes the dialog background image location.
| Enumerator | 
|---|
| BACKGR_TILE  | 
 The background image tiles the dialog's client area.  
 | 
| BACKGR_TOPLEFT  | 
 The background image is located at top-left corner.  
 | 
| BACKGR_TOPRIGHT  | 
 The background image is located at top-right corner.  
 | 
| BACKGR_BOTTOMLEFT  | 
 The background image is located at bottom-left corner.  
 | 
| BACKGR_BOTTOMRIGHT  | 
 The background image is located at bottom-right corner.  
 |