I compiled some source code with windows vs 2010 & got the report below.What could be the cause? Help please! 1>------ Build started: Project: HelloWorld, Configuration: Debug Win32 ------ 1>Build started 7/9/2012 8:21:16 AM. 1>InitializeBuildStatus: 1> Touching "Debug\HelloWorld.unsuccessfulbuild". 1>ClCompile: 1> helloWorld.cpp 1> _WIN32_WINNT not defined. Defaulting to _WIN32_WINNT_MAXVER (see WinSDKVer.h) 1>c:\users\abalone\documents\visual studio 2010\projects\helloworld\helloworld\helloworld.cpp(34): error C2664: 'CFrameWnd::Create' : cannot convert parameter 2 from 'const char [13]' to 'LPCTSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>c:\users\abalone\documents\visual studio 2010\projects\helloworld\helloworld\helloworld.cpp(39): error C2664: 'CStatic::Create' : cannot convert parameter 1 from 'const char [12]' to 'LPCTSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1> 1>Build FAILED. 1> 1>Time Elapsed 00:00:52.21