@Joshy, Yeah, the C header provides a lot of hints at how to use Axoclampdriver.dll, but there are remaining challenges that I have taken up with the vendor. For example, I can successfully get the handle and serial number of the device using the dll, but if I try to open the device an error code of...

@Joshy, Thanks!!!! I can now access all the functions in AxoClampDriver.dll. Now I just need to figure out how to use it with essentially no documentation. Also, thanks for correcting my pointer error in the nError parameter. BTW for your example, I think Len(SerialNum) needs to be SizeOf(SerialNum)...

Almost there, happy to supply Johnnie Walker Black Edition when I can get it to work here. Here's a link to AxHIDManager.dll. The company didn't provide the .h file :-( https://sites.google.com/site/freebasicgui/Home/fb-examples/AxHIDManager.dll?attredirects=0&d=1 I'm still getting a problem wit...

Thanks. I have been able to communicate with the DLL to confirm the API Version and to communicate with the hardware to retrieve the serial number (via AXC_FindFirstDevice). Here's the DLL https://sites.google.com/site/freebasicgui/Home/fb-examples/AxoclampDriver.dll?attredirects=0&d=1 and the a...

Still getting the same error - Entry Point could not be located Here's a screen shot of the export table from PExplorer. All the functions with the "_" prefix cause the same error, whereas I can call any of the functions without "_". I have tried making a MyLIb.def file with and ...

The FB compiler doesn't like the extern "Windows-MS" ... end Extern statements, which cause the error message "undefined reference to 'AXC_CheckAPIVersion'. If I remove the extern statements, then it complies and seems to work (Returns API version "1" but I'm not sure if tha...

Yes, it's axoclampdriver.dll. I'll try tomorrow AM.
Thanks.

Trying to call routines in a commercially provided dll. The company provides the .h file with the proc and func definitions. Part of the .h file is shown below // define the macro for exporting/importing the API entry points. // N.B. the symbol below should only be defined when building this DLL. #i...

@jj2007 - your ASM conversion is the fastest of the suggested approaches. I suppose this code would work for any 32-bit value (e.g. even for long integer)? It's been a while since I wrote code ASM, what modification would be needed for a 16 bit value (e.g. short integer)?

@fxm, thanks for catching ptr issue with Zstring. With your byte ptr modification, the code runs correctly.

@jevans I'll do some timing tests, and then consider diving into your asm version.

Thanks to all

Thanks for the ideas.

@sarvaldez, I get a segment violation error at this line:

returnFloat[0] = floatToConvert[3]

Is Callocate needed to set aside memory for the arrays?

Trying to read 32-bit floating point numbers from a binary data file created by LabView. Apparently LabView uses Big Endian since it was originally developed on a Mac OS. Anyone have a fast Big Endian -> Little Endian converter (to work on single float variable or array of single float)?

I've used BLoad and BSave to move large chunks of data between disk and memory. It would be interesting to perform a quantitative test of the two methods.

Many thanks for the code. All examples worked well. At first, I did not realize there is a simple solution to the area of a polygon, given the coordinates of the verticies. This site has a great review of geometric relationships and algorithms http://geomalgorithms.com/a01-_area.html For those who a...

Anyone have an efficient routine for the "point in a polygon" problem? The idea is that a set of connected points defines a closed polygon. Now, for any given new test point, is it inside our outside the polygon? This method will be used for a complex polygon with about 300 points (from tr...