I am working with the Microsoft 6 Visual Studio C++ standartd edition

I have an ODBC access driver, and I got it to work in a tester program, but
I get C++ mangled names when I try to use an MFC application.

Can I get microsoft support for this.
I put these statements in a header but it still didn't work..

I would like to ask for a support but I forgot how.

extern "C" {
SQLRETURN SQL_API SQLFreeEnv(HENV);
SQLRETURN SQL_API SQLFreeConnect(HDBC);
SQLRETURN SQL_API SQLDisconnect(HDBC);
SQLRETURN SQL_API SQLFreeStmt(SQLHSTMT,SQLUSMALLINT);
SQLRETURN SQL_API SQLBindCol(SQLHSTMT,SQLUSMALLINT,SQLSMALLINT,SQLPO INTER,
SQLINTEGER,SQLINTEGER*);
SQLRETURN SQL_API SQLFetch(SQLHSTMT);
SQLRETURN SQL_API SQLAllocStmt(SQLHDBC,SQLHSTMT*);
SQLRETURN SQL_API SQLDriverConnect(SQLHDBC,SQLHWND,SQLTCHAR*,SQLSMAL LINT,
SQLTCHAR*,SQLSMALLINT,SQLSMALLINT*,SQLUSMALLINT);
SQLRETURN SQL_API SQLAllocConnect(SQLHENV, SQLHDBC*);
SQLRETURN SQL_API SQLAllocEnv(SQLHENV*);
SQLRETURN SQL_API SQLExecDirect(SQLHSTMT,SQLTCHAR*,SQLINTEGER);
e.g.
error LNK2001: unresolved external symbol _SQLFreeEnv@4
error LNK2001: unresolved external symbol _SQLFreeConnect@4
error LNK2001: unresolved external symbol _SQLDisconnect@4
error LNK2001: unresolved external symbol _SQLFreeStmt@8
error LNK2001: unresolved external symbol _SQLBindCol@24
error LNK2001: unresolved external symbol _SQLFetch@4
error LNK2001: unresolved external symbol _SQLAllocStmt@8
error LNK2001: unresolved external symbol _SQLDriverConnect@32
error LNK2001: unresolved external symbol _SQLAllocConnect@8
error LNK2001: unresolved external symbol _SQLAllocEnv@4
error LNK2001: unresolved external symbol _SQLExecDirect@12

(I know some of these functions are depreciated but they worked in one but
program)

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