ffpath - find file path

The function browses very fast current directory and directories known in 'matlabpath' and the system variable 'path'. It searches for the file, name of which is in the input argument 'fname'. If a directory is found, the output argument pth is filled by a path to the file name from 'fname', otherwise pth is set empty. File names should have their extensions, but MATLAB m-files.

Arguments:
fname = file name
pth = path to the fname

Examples:
pth = ffpath('gswin32c.exe')
% c:\Program Files\gs\gs8.60\bin\
pth = ffpath('hgrc')
% C:\PROGRA~1\MATLAB\R2006b\toolbox\local