C# Definition:

[DllImport("dwmapi.dll", PreserveSig = true)]
public static extern int DwmSetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE attr, ref int attrValue, int attrSize);

VB Definition:

   TODO

User-Defined Types:

DWMWINDOWATTRIBUTE

Notes:

Use the DwmIsCompositionEnabled function to set the value of non-client rendering attributes for a window.