Structure alignment issues encountered using LabVIEW

The following structure is passed between LV and VC's WIN32 DLL.
typedef struct  npm_axis
{
   int  axis_select;
   int     sv;//initial speed
   int     v;//drive speed
   //int    acc;//linear acceleration
   //int    dec;//linear deceleration
   int    sacc;//s-curve acceleration interval
   int     sdec;//s-curve deceleration interval
   int    tacc;//acceleration time
   int    tdec;//deceleration time
   char     line_s;//acceleration mode    
   int limit_speed;//speed limit
   int    pos;//absolute
   int    dis;    //increment int
   center;
   //int    speed;//start command
} uAXIS;

As a result, the data below char are all wrong. The reason is found on the Internet: LV uses a byte alignment method, that is, the cluster of LV is stored without gaps, and the size of the space occupied is the sum of the space occupied by this element. Usually, the DLL uses integer alignment (related to the compiler).

You can change char to int to deal with emergencies. It is recommended to refer to the example of CALL DLL.VI in LV.