unmanaged

I tested a lot. But I found no disadvantages of those 2! But see the accepted answer. I read here that calling GetLastError in managed code is unsafe because the Framework might internally "overwrite" the last error. I have never had any noticeable problems with GetLastError and it seems for me that the .NET Framework is smart enough not to overwrite it. Therefore I have a few questions on that topic: in [DllImport("kernel32.dll", SetLastError = true)] does the SetLastError attribute make the Framework store the error code for the use of Marshal.GetLastWin32Error() ? is there an example where

After seeing and listening a lot regarding managed and unmanaged code, and knowing the only difference is that managed is about CLR and un-managed is outside of the CLR, it makes me really curious to know it in detail. What is it all about, managed and unmanaged code, memory and size? How can code I write in C# be unmanaged while this is C# code and how does a memory of size becomes unmanaged. An example and a little insight would be helpful. Short answer: Managed code is .NET code (VB.NET, C# etc.) that you write and compile to .NET CIL . Unmanaged code is code that is not under .NET that

as stated in the title, I want to have my old C++ library working in managed .NET. I think of two possibilities: 1) I might try to compile the library with /clr and try "It Just Works" approach. 2) I might write a managed wrapper to the unmanaged library. First of all, I want to have my library working FAST, as it was in unmanaged environment. Thus, I am not sure if the first approach will not cause a large decrease in performance. However, it seems to be faster to implement (not a right word :-)) (assuming it will work for me). On the other hand, I think of some problems that might appear

I'm writting a program in c# that uses a C++ library, and for some reason I need to allocate an unmanaged buffer to pass it to the lib. Is there a way to do this in c# ? Basically I would just need to do a malloc in C#... Thanks Try something like this: using System; using System.Runtime.InteropServices; class Example { static void Main() { IntPtr pointer = Marshal.AllocHGlobal(1024); } } This uses the Marshal.AllocHGlobal method: Allocates memory from the unmanaged memory of the process by using the specified number of bytes. You can also use a byte array for this. You do this by using an

I have an unmanaged DLL with a function that can run for a long time if the input parameter is a large value, sometimes that is desirable but not always. How can I in c# call this function so that I can abort it when needed? So far I have tried to put the call in a separate thread, but neither interrupt nor abort seem to stop the process, which runs at 100% CPU until the dll is done. Is it possible to terminate the running dll code? Unmanaged code is only abortable if it is an "alertable wait state". It won't be when it is burning 100% cpu cycles. P/Invoking TerminateThread would work,