function IsFileInUse(fName:string):Boolean;
var
HFileRes:HFile;
begin
Result :=False;
if not FileExists(fname) then
exit;
HFileRes :=CreateFile(pchar(fName),GENERIC_READ or GENERIC_WRITE,0,nil,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
Result :=(HFileRes=INVALID_HANDLE_VALUE);
if not Result then
CloseHandle(HFileRes);
end;
