嗨，我在微软的标准文件“iosfwd”＆atlconv.h”得到这么多的语法错误。（我已经粘贴下面的一些错误）::真的不理解标准文件iosfwd＆atlconv.h这样的错误背后的原因。任何帮助是极大的赞赏。
在IOSFWD错误
\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(350) : error C2065: '_Size_in_words' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(350) : error C2065: '_First2' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(350) : error C2065: '_Count' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(350) : error C3861: '_CRT_SECURE_WMEMCPY': identifier not found
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(351) : error C2065: '_First1' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(358) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(358) : error C2146: syntax error : missing ')' before identifier '_Elem'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(358) : error C2059: syntax error : ')'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(358) : error C2059: syntax error : ')'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(366) : error C2065: '_First1' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\include\iosfwd(366) : error C2065: '_Count' : undeclared identifier
误差atlconv.h ::
program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(530) : error C2146: syntax error : missing ')' before identifier 'LPDEVMODEA'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(530) : warning C4229: anachronism used : modifiers on data are ignored
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(530) : error C2495: 'AtlDevModeW2A' : '__declspec(nothrow)' can only be applied to function declarations or definitions
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(530) : error C2059: syntax error : ')'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2448: '_Ret_opt_z_cap_' : function-style initializer appears to be a function definition
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2143: syntax error : missing ';' before '__stdcall'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C3861: '_Out_z_cap_': identifier not found
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2146: syntax error : missing ')' before identifier 'LPWSTR'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : warning C4229: anachronism used : modifiers on data are ignored
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(535) : error C2059: syntax error : ')'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(536) : error C2143: syntax error : missing ';' before '{'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2448: '_Ret_opt_z_cap_' : function-style initializer appears to be a function definition
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2143: syntax error : missing ';' before '__stdcall'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C3861: '_Out_z_cap_': identifier not found
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2146: syntax error : missing ')' before identifier 'LPSTR'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : warning C4229: anachronism used : modifiers on data are ignored
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(554) : error C2059: syntax error : ')'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(555) : error C2143: syntax error : missing ';' before '{'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2448: '_Ret_opt_z_cap_' : function-style initializer appears to be a function definition
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2143: syntax error : missing ';' before '__stdcall'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2065: 'nChars' : undeclared identifier
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C3861: '_Out_z_cap_': identifier not found
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2146: syntax error : missing ')' before identifier 'LPWSTR'
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : warning C4229: anachronism used : modifiers on data are ignored
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>c:\program files (x86)\microsoft visual studio 9.0\vc\atlmfc\include\atlconv.h(572) : error C2374: 'AtlA2WHelper' : redefinition; multiple initialization
这些仅仅是一些错误，我已经在这里粘贴，因为我不能粘贴每个错误。 但是，所有的错误都在这2个文件只（IOSFWD＆atlconv.h“）。
