I have these visual glitches on every tabControls when I am changing its tabPages BackColor and the BackColor of the form, as illustrated on the following images:

  • At the top of the tabPage, there is an interior one-pixel white border.
  • At the left of the tabPage, there is an interior three-pixels white border.
  • At the bottom of the tabPage, there is an interior one-pixel white border and an exterior two-pixels white border.
  • At the right of the tabPage, there is an interior one-pixel white border and an exterior two-pixels white border.

Top and left borders Bottom borders Top and right borders

Is there a way I can get rid of those white borders?

c# winforms tabcontrol
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