static void Main(string[] args)
{
// <snippet1>
// Create an instance of an unmanged COM object.
UnmanagedComClass UnmanagedComClassInstance = new UnmanagedComClass();
// Create a string to pass to the COM object.
string helloString = "Hello World!";
// Wrap the string with the VariantWrapper class.
object var = new System.Runtime.InteropServices.VariantWrapper(helloString);
// Pass the wrapped object.
UnmanagedComClassInstance.MethodWithStringRefParam(ref var);
// </snippet1>
}
public Variant(VariantWrapper wrapper)
{
if (wrapper == null) throw new ArgumentNullException("wrapper");
varType = (ushort)(VarEnum.VT_VARIANT | VarEnum.VT_BYREF);
reserved1 = 0;
reserved2 = 0;
reserved3 = 0;
boolvalue = 0;
ptr1 = IntPtr.Zero;
ptr2 = IntPtr.Zero;
// Allocate memory for the VT_BYREF VT_VARIANT.
ptr1 = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(Variant)));
// Move the wrapped object into the memory.
Marshal.GetNativeVariantForObject(wrapper.WrappedObject, ptr1);
}
public virtual extern void Add([In] System.Runtime.InteropServices.VariantWrapper pValue);
public int OnScriptTerminate(VariantWrapper varResult, ref System.Runtime.InteropServices.ComTypes.EXCEPINFO excepInfo)
{
return 0;
}
