Hello Torrence,
The imgCreateBuffer function creates a buffer of image space that you can then be set into the Buffer List. There is a parameter for imgCreateBuffer called "uInt32 bufferSize" that you can use to set the size of your buffer. The buffer size needs to be atleast
= [ROI height] x [rowPixels] x [number of
bytes per pixel]. This basically allocates memory so images can use DMA to transfer directly into kernal level memory. You can find out the description for the IMAQ function calls by going to: Program Files >> National Instruments >> Vision >> Documentation and then choosing "NI IMAQ Function Reference". We also have examples that are shipped with NI IMAQ that can be found by opening up a windows explorer menu and going to the following destination: "<root>:\Program Files\National Instruments\NI-IMAQ\Sample". In here a good example to look at that uses imgCreateBuffer is "LL Ring". I hope this information helps. Thanks and have a great day.
Regards,
Mark T
Applications Engineer
National Instruments
