Thank you for the clarification of the question.
Here is the CodeProject article for you to learn about related techniques:
WinForm Extended[
^].
These two CodeProject articles can also be useful:
Winforms SkinFramework[
^],
WinForms Form Skin[
^].
I would advise you to avoid such deep customization, as it requires P/Invoke and hence kills platform compatibility which you could have with pure
FCL System.Windows.Forms
library.
Enjoy,
—SA