Appends the path delimeter to the path.
AppendPathDelim checks if the last character in the path is the path delimeter. If it isn't the path delimeter, it is added, otherwise the unmodified path is returned.
Removes trailing path delimeter
ChompPathDelim checks if the last character in the path is the path delimeter. If it is the path delimeter, it is removed, otherwise the unmodified path is returned.
File mask representing all files suitable for showing in a file filter.
GetAllFilesMask returns a File Mask suitable for showing in a filter of a Open File Dialog.

windows '*.*' is returned, on other operating systems just '*'.