Depends - is the DSP a COM object or exported functions (perhaps even a class - but that gets more complicated; see the CallingConvention.ThisCall for details - and you'll need to implement an exported class factory function). If it's COM, declare your RCW (don't forget all the attributes: ComImportAttribute, GuidAttribute, etc.), or use tlbimp.exe or VS.NET's Add Reference if you're COM server has a typelib (or you have a detached typelib). If you're using exported functions, you'll need to use P/Invoke (see DllImportAttribute) to call the functions. With CallingConvention.ThisCall, you declare your functions with an extra parameter (the first parameter!) that is an IntPtr, which is a handle to your object. You should also define and export a class factory function, as well as a destruction function to tear-down the object. See a previous reply I wrote for more details about ThisCall: http://www.codeproject.com/script/comments/forums.asp?msg=771919&forumid=1649#xx771919xx[^]. Software Design Engineer Developer Division Sustained Engineering, Microsoft My Articles

Linker Tools Error LNK2001 When your writing code you have to label the functions, variables, classes, etc... If you label something that it cannot find or is listed twice you will receive an LNK2001 process error. If that doesn't work try this on the main menu of Visual C++ go to project settings, and click on the C/C++ tab. remove _ATL_MIN_CRT from the preprocessor definitions, although depending on what version of Visual C you are running it may automatically be removed. Most likely however their is a function or variable that is listed twice in the Class tree, which again is causing compilation errors. Although if this doesn't work try looking at the error itself at msdn. Here is the link feel free to email me if you have any more questions or are still receiving problems -Mike

The :: means "the pow() function from the globalname space". This is redundant if you dont use namespaces, and probably if you do but I like to use it when calling functions from the c library as it makes the code a bit easier to read im my opinion. Look at the declaration of the pow() template function in math.h if you are still unsure about how to use it

-> dereferences a class object pointer. SomeClass { public : int a; }; So if you have SomeClass *oSomeClass = new oSomeClass(); Accessing member variable a is done by first dereferencing the pointer and using the '.'operator: (*oSomeClass).a = 5; which is equivalent to the statement oSomeClass->a = 5;

"ptrsomeclass->whatever" is shorthand for "(*ptrsomeclass).whatever" you must have a pointer to someclass to use -> you must have a direct instance of someclass to use . for example: someclass someobject; someclass* ptrobject = &someobject; //&=addressof someobject.whatever; (*ptrobject).whatever; //* dereferences address ptrobject->whatever; // same as line above Sincerely, -Ron

John, thanks for the reply. I was wondering if I could just use mnX.Length myself. It definitely seems more elegant.

If you define the array of cBiquad objects in the constructor it's only a local variable and no longer accessible as soon as the constructor scope is left. You have to define a class variable for the array. You will also have to initialize your array before you create it's members. cBiquad[] arrBiquads = new cBiquad[mnBiquads]; for ( i = 0; i < mnBiquads; i++ ) { arrBiquads[i] = new cBiquad(); } www.troschuetz.de

C# classes do not have header files, pretty much anything in the header can be discarded. The declaration of functions in C# is the same as the definition, and everything can automatically see the namespaces in the project, without having to include anything. Yes, the best way to set properties is with get/set methods, then you can make variables that can be got and not set, and vice versa, if needed. Christian I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

crushinghellhammer wrote: Is there a more elegant way of doing this Nope, that's about it. You could write a class factory of sorts that would take care of this for you, depending on what you are doing that may be overhead. - Nick Parker My Blog | My Articles

crushinghellhammer wrote: Is there any difference between these two techniques - casting and ToSingle? The basic difference is that a cast can thrown an exception which means anytime you cast something you should also wrap it in a try/catch block to handle any exception that is thrown. This in turn emits additional IL instructions, not much but it's there. - Nick Parker My Blog | My Articles

crushinghellhammer wrote: What exactly is IntPtr IntPtr Structure[^] - Nick Parker My Blog | My Articles

The whole point of using Math.Max is to compare the current array value with the previous max value. Whichever one is greater gets stored as the max value and compared to the next value, and so on. My code works under normal circumstances, but it might not work for the constraints you have (like your starting indexes, etc.). You must not reset the max each time, though, otherwise you're comparing the current array value with 0, so the last positive number in your array (or subset - whatever you're comparing) will be stored as the max value. You must remember it as I did in my example so you only store the max. If you want to take negative numbers into account, set the max value initially to Int32.MinValue. Microsoft MVP, Visual C# My Articles

Sure, why not?! :) It just depends on your requirements and implementation. -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----

You're not overriding the functionality of the CollectionBase like you're supposed to. See the class documentation itself for an example at the bottom of the page. -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----

In your form class set up a member variable like: private int currentIndex = -1; // before the start of the array In your button click event handler: currentIndex++; if (currentIndex==5) // Don't run off the end of the array currentIndex = 0; // Reset to the start // Build the label text StringBuilder sb = new StringBuilder(); for(int i=0; i<9; i++) { sb.Append(arrayObject[currentIndex, i].ToString()); sb.Append(" "); } labDisp.Text = sb.ToString(); I'm assuming your array is called "arrayObject" since you didn't mention it anywhere. --Colin Mackay-- EuroCPian Spring 2004 Get Together[^]

If what you need is free, and in C# then you could try: http://www.csharphelp.com/archives3/archive503.html[^] "Je pense, donc je mange." - Rene Descartes 1689 - Just before his mother put his tea on the table. Shameless Plug - Distributed Database Transactions in .NET using COM+