StringToValue需要包含哪个头文件？解决办法

StringToValue需要包含哪个头文件？
错误信息：[C++ Error] Unit1.cpp(22): E2268 Call to undefined function 'StringToValue'

[解决办法]
OleCtrls.hpp
[解决办法]

C/C++ code

class PASCALIMPLEMENTATION TEnumPropDesc : public System::TObject {    typedef System::TObject inherited;    private:    int FDispID;    int FValueCount;    TEnumValue *FValues;    public:    __fastcall TEnumPropDesc(int DispID, int ValueCount, const _di_ITypeInfo TypeInfo);    __fastcall virtual ~TEnumPropDesc(void);    void __fastcall GetStrings(Classes::TGetStrProc Proc);    int __fastcall StringToValue(const AnsiString S);    AnsiString __fastcall ValueToString(int V);};