c++builder6 中子窗体，窗体名是否已经存在的属性是什么？
创建一个MDIapplication,
void __fastcall TMainForm::CreateMDIChild(String Name)
{
TMDIChild *Child;

//--- create a new MDI child window ----
Child = new TMDIChild(Application);
Child->Caption = Name;
Child-> HaveName=false;//这里提示HaveName不是Child成员，可是我看教材上是写的啊if (FileExists (Name))
Child->Memo1->Lines->LoadFromFile(Name);
Child->HaveName=true;//

}


[解决办法]
妖哥给你说的很清楚了啊

C/C++ code

class TForm1 : public TForm{__published:    // IDE-managed Components    TADOQuery *ADOQuery1;    void __fastcall FormCreate(TObject *Sender);private:    // User declarationspublic:        // User declarations    __fastcall TForm1(TComponent* Owner);    bool HaveName;//这样定义};