Fingerprint reader function

Read fingerprint images from fingeprint reader into MATLAB workspace

This very simple function uses the Windows biometric framework to obtain fingerprint images from a built-in fingerprint sensor of a Windows PC. The function also uses the mex-functionality and therefore can be used like any other MATLAB function after compiling. It will return an image matrix to the MATLAB workspace. Due to security reasons MATLAB has to run in administrator mode to be able to obtain a fingerprint image. Currently memory allocation is an issue with this function which might result in loss of data before the function returned the image. Since I'm not very experienced in memory allocation under C++ I hope someone can help me fix this issue.