大家指教一下，这一般是什么原因？
--------------------Configuration: PersonInfoSys - Win32 Debug--------------------
Compiling...
SetSalaryDlg.cpp
f:\1\debug\msado15.tlh(407) : warning C4146: unary minus operator applied to unsigned type, result still unsigned
F:\1\SetSalaryDlg.cpp(86) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class CString' (or there is no acceptable conversion)
F:\1\SetSalaryDlg.cpp(94) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class CString' (or there is no acceptable conversion)
Error executing cl.exe.
PersonInfoSys.exe - 2 error(s), 1 warning(s)
大家帮忙看看，红色的部分和蓝色的部分一般可能是由于什么原因？
谢谢！
