Tracy and Ted, Your responses were just what I needed!
I miss hanging out here. All the off the wall discussions, not to mention the really cool tips on things I can do with VFP. Too bad MS has done such a good job of mucking it all up.... But it's good to hear from you (and the others). Anyway, thanks again, Fletcher Fletcher Johnson fletchersjohn...@yahoo.com 408-781-2345 - Cell 408-946-0960 - Work 501-421-9629 - Fax -----Original Message----- From: profox-boun...@leafe.com [mailto:profox-boun...@leafe.com] On Behalf Of Tracy Pearson Sent: Tuesday, September 06, 2011 2:11 PM To: profox@leafe.com Subject: RE: Passing structs to COM objects Fletcher Johnson wrote on 2011-09-06: > Hi all, > > > Long time, no chat.. > > > I am working on a VFP project that requires that I pass a struct. > For my current problem, it wants an array of structs that simply have 2 doubles. > > > I seem to remember there being a fairly straightforward way to create > a variable that, to the COM objects method, looks like a struct, > when, in fact, it is a string of values patched together. > > > So the code in .net might look like > > > Dim pt(2) as somestruct > > Pt(0).x = 123.9876 > > Pt(0).y = 456.789 > > Pt(1).x = 123.1 > > Pt(1).y = 789 > > > Comobj.SomeSillyMethod(pt) > > > And the structure looks something like: > > Structure Somestruct > Double x > > Double y > > > I assume I should be able to use a VFP array, but not sure how to > model the > struct. > > > I am also not sure how to do it so that it sees it as a double and > not a decimal or some other data type. > > > Any and all ideas are welcome! > > > Take care, > > > Fletcher > > (who lurks here when time permits or problems require) > > > Fletcher Johnson > Fletcher, You cannot use the VFP Array. BINTOC(xValue, "4RS")+BINTOC(yValue, "4RS") should give you the structure. The DECLARE of the API will need to have that parameter be STRING. If you need the information back, because it's an in/out parameter, it may work. When I worked with the ShellExecuteEx() API, it worked fine. When I worked with AllocateAndInitializeSid() and CheckTokenMembership() I needed to allocate memory and free it with HeapAlloc(), HeapFree(). When I initialized the allocated memory, I used SYS(2600). API's are a fun puzzle (for some). Tracy Pearson PowerChurch Software [excessive quoting removed by server] _______________________________________________ Post Messages to: ProFox@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/04c201cc7292$a9f48db0$fddda910$@yahoo.com ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
