The EM_DISPLAYBAND message displays a portion of a rich edit control’s contents, as previously formatted for a device using the EM_FORMATRANGE message.
EM_DISPLAYBAND wParam = 0; lParam = (LPARAM) (LPRECT) lprc;
If the operation succeeds, the return value is TRUE.
If the operation fails, the return value is FALSE.
Text and OLE objects are clipped by the rectangle. The application does not need to set the clipping region.