请教TCollectionItem在BCB的使用

[hqylfy]

日前在弄点小东东，想用TCollection和TCollectionItem来完成，但是在继承TCollectionItem的时候有点问题，老是编译通不过，提示[C++ Error] CGrids.h(21): E2251 Cannot find default constructor to initialize base class 'TCollectionItem'，找不到默认的构造函数，不知如何解决，源码如下：
class TCColumn : public TCollectionItem
{
typedef Classes::TCollectionItem inherited;
private:
String FColumnName;
long FColumnWidth;
public:
TCColumn(TCollection* Collection)
{

}; void __fastcall SetColumnName(String sColumnName)
{
FColumnName = sColumnName;
};

void __fastcall SetColumnWidth(long nColumnWidth)
{
FColumnWidth = nColumnWidth;
};
__published:
__property String ColumnName = {read = FColumnName , write = SetColumnName};
__property long ColumnWidth = {read=FColumnWidth , write=SetColumnWidth};

};

[珍惜生命远离CPP]

需要调用基类的构造函数
红色部分改成这样

       TCColumn(TCollection* Collection):TCollectionItem(Collection)
        { 

        };