dllimport

I've had some problems passing string as PChar to Delphi built DLL, and resolved it thanks to Jens Mühlenhoff. Now I have another issue - I've made successful callback of c# method when passed to DLL if the Delphi declaration is a regular type procedure, but if Delphi declaration is a method type procedure I get "Attempted to read or write protected memory" error. I tried searching... Here is Delphi declaration TCallBack = procedure ( s : String) of object;stdcall; Here is C# code [DllImport( "DLLTest.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi, EntryPoint =

So I'm using the following code to dump every extended file attribute to the debug console... ShellClass shellClass = new ShellClass(); Folder dir = shellClass.NameSpace(Path.GetDirectoryName(sFilePath)); FolderItem item = dir.ParseName(Path.GetFileName(sFilePath)); for (int i = 0; i < 267; i++) { System.Debug.WriteLine(dir.GetDetailsOf(item, i)); } As Shell32 is a non-managed library, I can't embed the DLL resource in the program directly, and it has to generate an interop helper DLL. Anyone know of the DLLImport command lines for these functions in Shell32 to get around the whole generation

I have yet to find a good reference on this topic. For this example we will take some C++ code that I'm trying to port over to C#. In C++ land we have the following prototype for an external library function: extern "C" DWORD EXPORT FILES_GetMemoryMapping( PSTR pPathFile, PWORD Size, PSTR MapName, PWORD PacketSize, PMAPPING pMapping, PBYTE PagesPerSector); and in it is used like such: FILES_GetMemoryMapping((LPSTR)(LPCTSTR)MapFile, &Size, (LPSTR)MapName, &PacketSize, pMapping, &PagePerSector); Now I'm trying to port the first line over to C# and here is where I'm presented with no clear path.

Is there any way to debug what is going on after my .NET code calls a function in an unmanaged dll via dllimport? I expose a dll function inside an unmanaged via dllimport. When I call a function as I step through the code, something happens and it never returns. Is there anything I can do, maybe with debug view or anything to get any information? Or am I SOL? Well, for starters, make sure you have native code debugging enabled in the Debug tab of your project's properties. If you have the source code for the DLL you are calling into, then you should be able to set it up so that you can step

I am trying to use a third party DLL that wants an int** as one of the parameters to the method. It describes the parameter as the address of the pointer that will point to the memory allocation. Sorry for any confusion. The parameter is two-way I think. The DLL is for talking to an FPGA board and the method is setting up DMA transfer between the host PC and the PCI board. Use a by-ref System.IntPtr . [DllImport("thirdparty.dll")] static extern long ThirdPartyFunction(ref IntPtr arg); long f(int[] array) { long retval = 0; int size = Marshal.SizeOf(typeof(int)); var ptr = IntPtr.Zero; try {

I need to check what window the user currently has selected, and do stuff if they have a specific program selected. I haven't used the GetForegroundWindow function before, and can't find any information on how to use it in this manner. I simply need an if comparing the current window to see if its a specific program. However the GetForegroundWindow function doesn't give back a string or int it seems. So mainly I don't know how to find out the value of the program window I want to compare it to. I currently have the code to get the current window: [DllImport("user32.dll")] private static extern