Name
deletefile — delete a file
Calling Sequence
f = deletefile(filename)
Parameters
- filename
- a file name existing or not. 
- f
- %t or %f 
Description
delete a file. if file has been deleted, it will return %t else
    %f.
Examples
fd = mopen(TMPDIR+'/filetodelete.txt','wt');
mclose(fd); 
if (fileinfo(TMPDIR+'/filetodelete.txt') <> []) then deletefile(TMPDIR+'/filetodelete.txt'),end;
deletefile(TMPDIR+'/notexistingfile')