为什么编译时头文件老是出错呢 (.net编译，XP）

hayseed

我写了一个用odbc连接数据库的c程序：
#include “sqlext.h”

SQLHENV henv;

SQLHDBC hdbc;

SQLHSTMT hstmt;

SQLRETURN retcode;

/*Allocate environment handle */

retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);

if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {

/* Set the ODBC version environment attribute */

retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*) SQL_OV_ODBC3, 0);

if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {

/* Allocate connection handle */

retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);

if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {

/* Set login timeout to 5 seconds. */

SQLSetConnectAttr(hdbc, (void*)SQL_LOGIN_TIMEOUT, 5, 0);

/* Connect to data source */

retcode = SQLConnect(hdbc, (SQLCHAR*) "Sales", SQL_NTS,

(SQLCHAR*) "JohnS", SQL_NTS,

(SQLCHAR*) "Sesame", SQL_NTS);

if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO){

/* Allocate statement handle */

retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);

if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {

/* Process data */;

SQLFreeHandle(SQL_HANDLE_STMT, hstmt);

}

SQLDisconnect(hdbc);

}

SQLFreeHandle(SQL_HANDLE_DBC, hdbc);

}

}

SQLFreeHandle(SQL_HANDLE_ENV, henv);
出错：
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(275) : error C2061: 语法错误 : 标识符“DWORD”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(276) : error C2061: 语法错误 : 标识符“Data2”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(276) : error C2059: 语法错误 : “;”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(277) : error C2061: 语法错误 : 标识符“Data3”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(277) : error C2059: 语法错误 : “;”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(27 : error C2061: 语法错误 : 标识符“Data4”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(27 : error C2059: 语法错误 : “;”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(27 : error C2059: 语法错误 : “[”
d:\Program Files\Microsoft Visual Studio .NET\Vc7\PlatformSDK\Include\SqlTypes.h
(279) : error C2059: 语法错误 : “}”
...


后来我将这个程序改为：
#include "sqlext.h"

main()
{
        exit(1);
}
还是出上面的错。
其他一些时候我也常常遇到这样的错误。
编译器带的头文件怎么会出错呢？
请高手帮帮我。谢谢！