public extern static Int32 HitTestThemeBackground(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, UInt32 dwOptions, ref RECT pRect, IntPtr hrgn, POINT ptTest, out HitTestThemeBackgroundCode code);

Declare Function HitTestThemeBackground Lib "uxtheme.dll" (TODO) As TODO

Public Shared Function HitTestThemeBackground(hTheme As IntPtr, hdc As IntPtr, iPartId As Integer, iStateId As Integer, dwOptions As UInt32, ByRef pRect As RECT, _

    hrgn As IntPtr, ptTest As POINT, ByRef code As HitTestThemeBackgroundCode) As Int32

public enum HitTestThemeBackgroundCode : ushort

Public Enum HitTestThemeBackgroundCode As UShort