Yet more in my battle with external libraries. To retrieve data, the library expects you to provide pointers to variables for each column you want to retrieve from a table. You then call "Fetch" to get the next row into those variables, and then read them and do whatever with them before calling "Fetch" again to update them with the next row.
This give a problem with Labview; I've tried passing an I32 by pointer to the library and then running the value through a FOR loop and autobuilt an array on the output to try and get it to update each time I call "Fetch" inside the loop- no luck, as far as LV is concerned the variable hasn't changed. I've also tried creating a control, passing a reference to it, getting the "Value" property and passing *that* by pointer to the library, then reading the control by reference in the FOR loop. Still no luck. I recall hearing a while back that someone had done C code that could take Labview variables by pointer and updated them on the fly, so it seems it IS possible. Anyone know how? -- Dr. Craig Graham, Software Engineer Advanced Analysis and Integration Limited, UK. http://www.aail.co.uk/
