//将TCHAR转为char   
//*tchar是TCHAR类型指针，*_char是char类型指针   
TcharToChar (const TCHAR * tchar, char * _char)  
    int iLength ;  
//获取字节长度   
iLength = WideCharToMultiByte(CP_ACP, 0, tchar, -1, NULL, 0, NULL, NULL);  
//将tchar值赋给_char    
WideCharToMultiByte(CP_ACP, 0, tchar, -1, _char, iLength, NULL, NULL);   
    int iLength ;  
    iLength = MultiByteToWideChar (CP_ACP, 0, _char, strlen (_char) + 1, NULL, 0) ;  
    MultiByteToWideChar (CP_ACP, 0, _char, strlen (_char) + 1, tchar, iLength) ;