别人的一个四参数拟合DLL

procedureSetFourParaCount(Count:integer);stdCall;external'JVD1.dll';procedureSetFourParaDot(Idx:integer;X,Y:Double);stdCall;external'JVD1.dll';functionDoFourParaFit:integer;stdCall;external'JVD1.dll';functionGetFourParaA:double;stdCal