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

First, call the system API. If you want to reference Shenma, we will not list them one by one. Copy codeThe Code is as follows: [StructLayout (LayoutKind. Sequential)]
Public struct MARGINS
{
Public int Left;
Public int Right;
Public int Top;
Public int Bottom;
}

[DllImport ("dwmapi. dll", PreserveSig = false)]
Public static extern void dwmextendframeworkclientarea
(IntPtr hwnd, ref MARGINS margins );

[DllImport ("dwmapi. dll", PreserveSig = false)]
Public static extern bool DwmIsCompositionEnabled ();

Then rewrite two events:Copy codeThe Code is as follows: protected override void OnLoad (EventArgs e)
{
If (DwmIsCompositionEnabled ())
{
MARGINS margin = new MARGINS ();
Margin. Right = margin. Left = margin. Bottom = margin. Top =-1;
Dwmextendframeworkclientarea (this. Handle, ref margin );
}
Base. OnLoad (e );
}

Protected override void OnPaintBackground (PaintEventArgs e)
{
Base. OnPaintBackground (e );
If (DwmIsCompositionEnabled ())
{
E. Graphics. Clear (Color. Black );
}
}

Finally, we have a. Mu. Run F5 ~