Hi all,
I have to call the following function that is part of a C dll:
icon_regfilt_createRegistrationFilter (const char * extractComponent, const char ** extractSubcomponent, const float * shifts, unsigned int nSubcomponents, enum regfilt_interpolation_method_t method, BOOL copySubComponents)
How can I pass the extractSubcomponent parameter, that is an array of strings (char**)?
In C it is quite simple, this is how the function is used:
char * registrationDataFormat;
char* extractionDataFormat;
const char* subComponents[3] = {"Red", "Green", "Blue"};
float shifts[3] = {0.0f, 0.0f, 0.0f};
// Create a registration filter for the component named Color 1
registrationFilter = icon_regfilt_createRegistrationFilter("Color 1", subComponents, shifts, 3, NN, FALSE);
In LabVIEW I tried a few:
- create the array of strings in LV and pass it directly to the call library node declaring it as "Adapt to type" and "Handle by value"
- create the array of strings in LV and pass it directly to the call library node declaring it as "Adapt to type" and "Pointer to handles"
- converting in LV the array of strings to a 2D array of numbers and passing this to the Call library function node (but I can't change the function in order to pass the array sizes)
but the problem is that in LV 8.5 it always crashes and in LV 2010 the function runs and returns a pointer as it is expected, without any error, but actually it doesn't create the memory structure that should create.
Have you ever passed an array of strings to a dll? How can I do this?
Thank you very much for your help!
