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Return lowest and highest modus of current driver
Source position: graphh.inc line 754
procedure GetModeRange(  | 
GraphDriver: SmallInt;  | 
var LoMode: SmallInt;  | 
var HiMode: SmallInt  | 
);  | 
GetModeRange returns the Lowest and Highest modus of the currently installed driver. If no modes are supported for this driver, HiModus will be -1.
None.
  | 
Initialize graphical system  |