菜问题,大家帮忙 马上给分
procedure TY_test.ApplyDates(CusVar: OleVariant);
var
Errcount:integer;
begin
Database1.StartTransaction;
try
if not VarIsNull(CusCar) then
begin
CusVar:=DataSetProvider1.ApplyUpdates(CusVar,0,ErrCount);
if ErrCount>0 then
SysUtils.Abort;
end;
Database1.Commit;
except
Database1.Rollback;
end;
end;
编译通不过,它竟然就不认识VarIsNull
[Error] Unit2.pas(50): Undeclared identifier: 'VarIsNull'
[Fatal Error] Project1.dpr(7): Could not compile used unit 'Unit2.pas'
怎么回事啊 ,