bcb+access中为啥老是弹出提示：W8060 Possibly incorrect assignment,该怎么处理

bcb+access中为啥老是弹出提示：W8060 Possibly incorrect assignment
各位老师，我现在搞了一个程序，编译可以通过，但老是弹出警告：[C++ Warning] Unit1.cpp(477): W8060 Possibly incorrect assignment。具体程序如下：
   
  AnsiString tmp1,mysql,tmp2=0;
  unsigned short Year;
  unsigned short Month;
  unsigned short Day;
  TDateTime DT;

  ADOQuery1->Open();
  ADOQuery1->Insert();
  ADOQuery1->FieldByName("时间")->Value=Now();
  ADOQuery1->FieldByName("母线A相电流值")->Value=temp1;
  ADOQuery1->FieldByName("母线B相电流值")->Value=temp2;
  ADOQuery1->FieldByName("母线C相电流值")->Value=temp3;
  ADOQuery1->FieldByName("补偿回路A相电流值")->Value=temp4;
  ADOQuery1->FieldByName("补偿回路B相电流值")->Value=temp5;
  ADOQuery1->FieldByName("补偿回路C相电流值")->Value=temp6;
  ADOQuery1->FieldByName("母线A相电压值")->Value=temp7;
  ADOQuery1->FieldByName("母线B相电压值")->Value=temp8;
  ADOQuery1->FieldByName("母线C相电压值")->Value=temp9;
  ADOQuery1->FieldByName("补偿回路报警A相电流值")->Value=temp17;
  ADOQuery1->FieldByName("补偿回路报警B相电流值")->Value=temp18;
  ADOQuery1->FieldByName("补偿回路报警C相电流值")->Value=temp19;
  ADOQuery1->Post();

  tmp1=Now();
  DT=StrToDateTime(tmp1);
  DT.DecodeDate(&Year,&Month,&Day);

  if(Month=1)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-7%'";
  if(Month=2)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-8%'";
  if(Month=3)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-9%'";
  if(Month=4)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-10%'";
  if(Month=5)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-11%'";
  if(Month=6)mysql="delete from UI where 时间 like '%"+IntToStr(Year-1)+"-12%'";
  if(Month=7)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-1%'";
  if(Month=8)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-2%'";
  if(Month=9)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-3%'";
  if(Month=10)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-4%'";
  if(Month=11)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-5%'";
  if(Month=12)mysql="delete from UI where 时间 like '%"+IntToStr(Year)+"-6%'";

  ADOQuery2->Close();
  ADOQuery2->SQL->Clear();
  ADOQuery2->SQL->Add(mysql);
  ADOQuery2->ExecSQL();
请问各位老师，我的程序哪里出错了呢？？？？帮忙指正呀！很急呀！！！

------解决方案--------------------
一个等号 是赋值的意思