Library functions - IncrDecr buttons

Can anyone please assist with c sctipt?

I have included the c script of a standard library Incr button. The problem I have is that this code just increments by a value of 1. Could I modify this code so that I can increment by 0.1?


// Increments assigned tag by 1
#include "trigger.h"
long value,max;
LINKINFO plink;
LPCTSTR szIndirectName;

PDLRTGetPropEx(0,lpszPictureName,lpszObjectName,"Process",VT_I4,&value,NULL,NULL,0,NULL,NULL);
PDLRTGetPropEx(0,lpszPictureName,lpszObjectName,"Max",VT_I4,&max,NULL,NULL,0,NULL,NULL);

if(value<=(max-1)) value+=1;
else value = max;

PDLRTGetLink(0,lpszPictureName,lpszObjectName,"Process",&plink,NULL,NULL,NULL);//Rueckgabe-Typ :BOOL
switch (plink.LinkType)
{
case (BUBRT_LT_VARIABLE_DIRECT):
SetTagDouble (plink.szLinkName, value);
break;
case (BUBRT_LT_VARIABLE_INDIRECT):
szIndirectName=GetTagChar(plink.szLinkName);
SetTagDouble (szIndirectName, value);
break;
case (BUBRT_LT_NOLINK):
SetPropDouble(lpszPictureName,lpszObjectName,"Process",value);
break;//Rueckgabe-Typ :BOOL

Here is a pdl created in V7 as an example.

I know this is an old post but I had the same issue and the link in the other replies did not work. Here is how I resolved this issue. The issue was with the data types. Changed from VT_I4 to VT_R4 in the C function and  "value" from long to float.

float value, inc;
long max;

LINKINFO plink;
LPCTSTR szIndirectName;

PDLRTGetPropEx(0,lpszPictureName,lpszObjectName,"Process",VT_R4,&value,NULL,NULL,0,NULL,NULL);
PDLRTGetPropEx(0,lpszPictureName,lpszObjectName,"Max",VT_I4,&max,NULL,NULL,0,NULL,NULL);

inc = 0.1;
if(value<=(max-1)) value+=inc;
else value = max;