Hi Joe, jharn wrote: I mislabeled my code. This is actually the tube material "70-30 Cu-Ni", "90-10 Cu-Ni", "Admiralty Metal", "Aluminum Brass", "Aluminum Bronze", "Arsenical Copper", "Cold-Rolled Low Carbon Steel", "Copper Iron 194 (Olin 194)", "Titanium Grades 1 & 2", "304 SS", "316/317 SS", "N08367 (AL6XN)", "S43035 (TP439)", "S44660 (Sea-Cure)", "S44735 (AL29-4C)" versus the tube gauge {12, 14, 16, 18, 20, 22, 23, 24, 25}; Which when matched up in x, y matrix returns the HEI gauge correction factor. Change the names to relevant ones :) jharn wrote: Problem is I can pass the VBA string to C++, but have had no success in checking it against the tube material values as shown above This is a really different issue. I suppose VBA uses Unicode, so what is transmitted to your dll is a BSTR or a wchar_t*. First investigate around that. If you don't solve post in the Questions and Answers area with VBA C++ dll tags; cheers, AR When the wise (person) points at the moon the fool looks at the finger (Chinese proverb)

Having looked at the code in your original message I see the problem. You are instantiating your arrays on the stack by statements such as: double J0[10] = {0, 1, -5, -4, -3, -2, -1, 2, 3}; and then trying to dispose of them by delete. This is the cause of your problem, you cannot delete a variable that was not created with new. Stack variables will be disposed of automatically when the function returns. I must get a clever new signature for 2011.

I think what he means is that you should use the formatting that this forum provides, either by marking your code block and clicking on the beige-underlined formatting button titled code block, or by manually surrounding your code block with the tags <pre> and </pre>. It should then look something like this in your editor window: if (a) { b = 1; } else { b = 0; } (that last <pre> should have been </pre> instead actually, but that would have prematurely ended my example since I used the same tags to format it in the first place :) )