Unmanaged dll code

Question

I have a C # application (.NET 3.5, VS2005 Professional) that uses an unmanaged 32-bit library written in C / C ++. The API I use is as follows:

void * Initialize (int x);

voic GetData (void *);

And this works when I run it on Windows XP 32bit, but on Windows XP64bit it throws an exception:

Unhandled exception: System.Reflection.TargetInvocationException: The exception was thrown by the target of the call. ---> System.BadImageFormatException: An attempt was made to load a program with the wrong format. (Exception from HRESULT: 0x8007000B) on Aktuelizator.CommonLibrary.InitializeRingBuffer (Int32 dim) on Aktuelizator.AktuelizatorWService.AktuelizatorWS..ctor ()

These unmanaged DLLs work under the 64-bit version of XP when called from the 32-bit unmanages writetn application in C / C ++.

Does anyone have any ideas?

Answer 1

The assembly configuration platform is configured to "Any processor", that is, on a 64-bit OS it works like 64 bits, and you can’t load the DLL. Instead, install x86, this will make it work as 32 bits, regardless of the OS, and your dll will load normally.

Answer 2

, DLL 32 , 32-, 64- . , . , , . 32- DLL 32- . DLL 64- # .

Answer 3

Check all the parameters that are defined as Int32, which should actually be IntPtr.