Use C# Winform to create a fully transparent frosted glass form effect code

protected override void OnLoad(EventArgs e)
{
if (DwmIsCompositionEnabled())
{
MARGINS margin = new MARGINS();
= = = = -1;
DwmExtendFrameIntoClientArea(, ref margin);
}
(e);
}

protected override void OnPaintBackground(PaintEventArgs e)
{
(e);
if (DwmIsCompositionEnabled())
{
();
}
}