MS Access ".ldb"

hello all

I use mdb as my app's DB file, when my app first run, a ".ldb" file the name as same as my DB file appears. I had written the code  to del the .ldb file when my app exit but everytime i open the app(exe) it appears again . 
Is there anyway can move the ".ldb"  to the windows temp folder not in my app(exe) current folder .thanks!