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MQL5 ReferenceStandard LibraryGraphic ObjectsCChartObjectDelete 

Delete

Removes an attached graphical object from the chart.

bool  Delete()

Return Value

true - success, false - cannot remove the object.

Example:

//--- example for CChartObject::Delete 
#include <ChartObjects\ChartObject.mqh> 
//--- 
void OnStart() 
  { 
   CChartObject object; 
   //--- detach chart object  
   if(!object.Delete()) 
     { 
      printf("Object delete error"); 
      return; 
     } 
  }