問題詳述:當我在DBGrid變更資料時，所在的tPopupMenu的一個Item->Enabled =true...而我問題出在這段..假如我先點DBGrid[1]時，這時PopupMenu[1]的 Enabled有改變..然後再去看PopupMenu[1]的Item..沒有改變..可是一去點DBGrid[0]時，就出問題了..Message:Access violation at address.. void __fastcall TChildFrame::DBGridKeyPress(TObject *Sender, char &Key) { tPopupMenu[PageControl1->ActivePageIndex]->Items->Items[0]->Enabled = true; } 以下是部分程式碼: int i=0; TTabSheet* TabSheet[Max]; TDBGrid* DBGrid[Max]; TPopupMenu **tPopupMenu; TMenuItem* tNewItem; void __fastcall TChildFrame::N3Click(TObject *Sender) { TabSheet[i] = new TTabSheet(PageControl1); TabSheet[i]->Name = AnsiString("TabSheet") IntToStr(i); DBGrid[i] = new TDBGrid(TabSheet[i]); DBGrid[i]->Name = AnsiString("DBGrid") IntToStr(i); tPopupMenu=new TPopupMenu*[Max]; tPopupMenu[i] = new TPopupMenu(this); tPopupMenu[i]->Name = AnsiString("APopupMenu") IntToStr(i); tNewItem = new TMenuItem(tPopupMenu[i]); tNewItem->Name = "PopupMenuItems" IntToStr(i); tNewItem->Caption = "復原上一步"; tNewItem->Enabled = false; tPopupMenu[i]->Items->Add(tNewItem); TabSheet[i]->PageControl = PageControl1; TabSheet[i]->Caption = "" OpenDialog1->FileName; TabSheet[i]->PopupMenu = tPopupMenu[i]; DBGrid[i]->Parent = TabSheet[i]; DBGrid[i]->OnKeyPress = DBGridKeyPress; i ; } void __fastcall TChildFrame::DBGridKeyPress(TObject *Sender, char &Key) { tPopupMenu[PageControl1->ActivePageIndex]->Items->Items[0]->Enabled = true; }