Please help me with my drawing problem

Hello Delphi programmers (and all others)!

I have a problem with the autosize-function of TImage:

I draw a picture on the screen with the TImage component
and then I place a rectangle in this picture. Now I
would like to move or resize this rectangle on the
picture (for selecting a part of the picture).
But if the autosize function of tbitmap is set to false then
the picture begins to tremble and to flicker if I try to
move the selected rectangle. Why? And
how could I solve this problem?

Please help me to solve this problem!

With best wishes

Bye

Elmar
## CrossPoint v3.1 R ##