Question

c++程序问题

WNDCLASS wndcls;
wndcls.CbClsExtra=0;
wndcls.CbWndExtra=0;
wndcls.HbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
wndcls.HCursor=loadcursor(NULL,IDC_cross);
wndcls.HIcon=loadicon(NULL,IDI_error);
wndcls.HInstance=HInstance;
wndcls.LpfnWndProc=winsunproc;
wndcls.LpszClassName="menghuanguaishou";
wndcls.LpszMenuName=null;
wndcls.Style=CS_HREDRAW | CS_VREDRAW;
RegisterClass(wndcls);
HWND hwnd;
大家看看这几行程序，显示错误
C:\Documents and Settings\Administrator\桌面\winmain.cpp(18) : error C2039: 'CbClsExtra' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(19) : error C2039: 'CbWndExtra' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(20) : error C2039: 'HbrBackground' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(21) : error C2039: 'HCursor' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(21) : error C2065: 'loadcursor' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\winmain.cpp(21) : error C2065: 'IDC_cross' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\winmain.cpp(22) : error C2039: 'HIcon' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(22) : error C2065: 'loadicon' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\winmain.cpp(22) : error C2065: 'idi_error' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\winmain.cpp(23) : error C2039: 'HInstance' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(24) : error C2039: 'LpfnWndProc' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
C:\Documents and Settings\Administrator\桌面\winmain.cpp(24) : error C2065: 'winsunproc' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\winmain.cpp(25) : error C2039: 'LpszClassName' : is not a member of 'tagWNDCLASSA'
d:\vc98\include\winuser.h(1184) : see declaration of 'tagWNDCLASSA'
为什么所有成员都不对呢
我是在msdn中抄的啊，看截图。能不能告诉我怎么不用抄，直接列出类的成员变量，好像有一个办法

Answer 1

大小写啦，像“CbClsExtra"就改写成“cbClsExtra”~~~C++对大小写可是很敏感的哦~~你这样写他死脑筋的不会认识的。

话说我不知道怎么补充回答...
我看你的那个截图咋是SDK的呢~~~好像不是给C++用的吧...（我用的是VC2008的帮助文档，对这个也不清楚，说的不一定对哈）
另外，你的编辑器是VC++吗，他本身有一个智能的啥功能（记不得名字了）...就是你有一个类或者机构体的实例后，它自会给你列出来其中的变量和函数...
如果没有这种情况，你可以先关闭工程，再跑到你的工程目录下，把一个.ncb的文件删去，然后再重新编译...这样能解决问题。如果你编译器压根就没有这功能的话，换一个吧...

另外，给LL点建议哈，嘿嘿。乍看您应该刚学VC，而你写的这个程序的结构属于win32应用程序结构，是一种基本的结构，虽然简单，但也是非常有含量的，我现在也才刚刚理解呢...建议你先跳过这块，能理解多少就理解多少，去学后面的MFC吧，当你了解VC的操作，了解VC的基本操作和一些语法时，再回头来看这部分吧~~~多看些参考书吧，VC门槛比较高，自己摸索会很费事的...
祝C++有成~~

Answer 2

厄，确实是，第一个字母都是小写的！呵呵

typedef struct _WNDCLASS {
UINT style;
WNDPROC lpfnWndProc;
int cbClsExtra;
int cbWndExtra;
HANDLE hInstance;
HICON hIcon;
HCURSOR hCursor;
HBRUSH hbrBackground;
LPCTSTR lpszMenuName;
LPCTSTR lpszClassName;
} WNDCLASS;

看到了吧？

在VS环境里，鼠标对准WNDCLASS，按右键，选择“转到定义”

Answer 3

你给的程序里咋没有tagWNDCLASSA这个变量？？？？