How to remove the shadow when moving a control?

  • Thread starter Thread starter Sowen Zhang
  • Start date Start date
S

Sowen Zhang

Hi,

this should not be a hard question, but I just couldn't find a good
solution.

what I am doing is:
1. a form has a background image
2. there is a panel placed on it, and this panel is transparent, so we can
see the background image
3. mouse down the panel, and mouse move the panel will drag the panel, mouse
up will stop the dragging


the issue is, when moving the panel, there is a black border around, or
looks like a shadow. if I drag fast, there will have many such a black boxes
in the screen.

how can I avoid this? Thanks a lot!



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