请教这种编译错误是什么意思
--------------------Configuration: connection - Win32 Debug--------------------
Compiling...
connectionDlg.cpp
c:\documents and settings\sushe\桌面\connection\debug\msado15.tlh(407) : warning C4146: unary minus operator applied to unsigned type, result still unsigned
connectionDlg.obj - 0 error(s), 1 warning(s)
大家好!请帮我看一下,这种错误该怎么处理?谢谢!