I have found this solution on this forum. And I have little problem to implement it to my database. I created a modules called Flicker with the code provided by Allen Browne. I choose the FixAllForm options.
My main form is called ChangeOfControlFormDetails and I have a tab control in this main form. At the present, I have two pages in the tab control and each page has two subforms.
I am just not so sure where in my main form should I put the FixAllForm. I try on-current, on-load and many other event tricker in the main form but nothing work. My screen still keep flicking or complaint from the modules.
I do have a pop up calendar visible my on-click on a control in the main form.
I have two command buttons will open two separate sub forms.