When inputting data form main one other always on form main

Aug 3 2018 2:29 AM

Suppose there are two forms: frmMain and frmPopup, frmPopup is always on frmMain, when select frmMain inputting data then frmPopup always on frmMain, frmPopup is always on frmMain, how is it to write code ? you see attach file http://www.mediafire.com/view/bq32fcb3ept329r/PopUpInput.jpg/file