Function
The prototype of the dll function is
unsigned long PassThruIoctl(unsigned long A, unsigned long B, void *pvar1, void *pvar2);
"void *pvar1" and "void *pvar2" are pointers to different Structures. The value of "unsigned long B" will determine what kind of Structure the pointer will represent.
One sample structure is given below when pvar1 is the pointer to SCONFIG_LIST.
typedef struct
{
unsigned long ParameterID; // this an input to the dll
unsigned long Value; // this is an output from dll
} SCONFIG;
typedef struct
{
unsigned long NumOfParams; // the no. of elements(SCONFIG) in array
(input)
SCONFIG *ConfigPtr; // the pointer to array of SCONFIG
(input)
} SCONFIG_LIST;
The function is supposed to get the values of configuration parameters (from an external interfacing device).
When I tried to run the function as shown in the attached VI, I always end up with error. The error I get is saying something about DLL corrupting the memory of Lab View.
