RMC_DeleteChart function.
Deletes a chart
Syntax
	nResult (LONG) = RMC_DeleteChart( ByVal nCtrlId (LONG) )
Parameter
	nCtrlId (LONG)
		Unique ID of the chart control, which shall be deleted.
Return value
	0
		There is no special return value, therefore always 0.
Remarks
		In case you called RMC_Draw() to show the chart on the screen you normally must not delete the chart. Because of it's nature as a control it will be destroyed when the dialog, which ownes the control, is destroyed (closed). If you did not show the chart calling RMC_Draw() but called instead RMC_Draw2Printer() or RMC_Draw2File() you must destroy the chart after saving or printing.