private unsafe static int TryExcelImpl4(int xlFunction, out object result, params object[] parameters)
{
int xlReturn;
// Set up the memory to hold the result from the call
XlOper resultOper = new XlOper();
resultOper.xlType = XlType.XlTypeEmpty;
XlOper *pResultOper = &resultOper; // No need to pin for local struct
// Special kind of ObjectArrayMarshaler for the parameters (rank 1)
using (XlObjectArrayMarshaler paramMarshaler = new XlObjectArrayMarshaler(1, true))
{
XlOper **ppOperParameters = (XlOper **)paramMarshaler.MarshalManagedToNative(parameters);
xlReturn = Excel4v(xlFunction, pResultOper, parameters.Length, ppOperParameters);
}
// pResultOper now holds the result of the evaluated function
// Get ObjectMarshaler for the return value
ICustomMarshaler m = XlObjectMarshaler.GetInstance("");
result = m.MarshalNativeToManaged((IntPtr)pResultOper);
// And free any memory allocated by Excel
Excel4v(xlFree, (XlOper *)IntPtr.Zero, 1, &pResultOper);
return(xlReturn);
}
internal static IntPtr XlAddInManagerInfo(IntPtr pXloperAction)
{
Debug.WriteLine("In XlAddIn.XlAddInManagerInfo");
ICustomMarshaler m = XlObjectMarshaler.GetInstance("");
object action = m.MarshalNativeToManaged(pXloperAction);
object result;
if ((action is double && (double)action == 1.0))
{
InitializeIntegration();
result = IntegrationHelpers.DnaLibraryGetName();
}
else
{
result = IntegrationMarshalHelpers.GetExcelErrorObject(IntegrationMarshalHelpers.ExcelError_ExcelErrorValue);
}
return(m.MarshalManagedToNative(result));
}
