//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Edit1MouseDown(TObject *Sender,
      TMouseButton Button, TShiftState Shift, int X, int Y)
{
if(Button==mbLeft)
((TEdit*)(Sender))->BeginDrag(False,-1);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Memo1DragOver(TObject *Sender, TObject *Source,
      int X, int Y, TDragState State, bool &Accept)
{
if(Source)->ClassNameIs("TEdit"))
Accept=True;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Memo1DragDrop(TObject *Sender, TObject *Source,
      int X, int Y)
{
if((Sender->ClassNameIs("TMemo"))&&(Source->ClassNameIs("TEdit")))
((TMemo*)(Sender))->Lines->Add(((TEdit*)(Source))->Text);
}
//---------------------------------------------------------------------------

[C++ Error]Unit1.cpp(28):E2188 Expression syntax  这个错误是什么