DwmSetWindowAttribute

C# Definition:

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

VB Definition:

<DllImport("dwmapi.dll", PreserveSig:=True)>
Public Shared Function DwmSetWindowAttribute(hwnd As IntPtr, attr As DWMWINDOWATTRIBUTE, ByRef attrValue As Integer, attrSize As Integer) As Integer
End Function