Maybe this can be at help for someone.
I wanted to add multiple buttons in a cell in TStringGrid, But Objects could just hold one.
So, i started to search.
After hours i found out that with Objects it is impossible.
So, i tried with TBitBitn, and added three buttons with rect position for the sell.
It worked, but after a while i saw that when scrolling, and the mouse became over a button, the scrolling went mad.
I used days of trying to fix it, but i couldn't solve it.
So, i tried to create buttons as TImage instead.
This works good. The scrolling problem disappeared.
TImage is not a TWinControl. But TBitBitn is.
So, TWinControl was the thing that was the problem.
I used three whole days trying to fix it, but only using none TWinControl fixed it.
I don't know why. Maybe anyone knows the fix.