[DllImport("uxtheme.dll", ExactSpelling=true)]
public extern static Int32 CloseThemeData(IntPtr hTheme);
VB .NET Signature:
Declare Function CloseThemeData Lib "uxtheme.dll" (ByVal hTheme As IntPtr) As Int32
<DllImport("UxTheme.dll", CallingConvention:=CallingConvention.Cdecl)> _
Function CloseThemeData(ByVal hTheme As IntPtr) As Int32
End Function