Importing Custom Types from DLL into C#

[poldoga]

Good day sirs,

I am currently working on creating windows GUI software for a hardware device. The hardware's functions are stored in a DLL. Here is the structure for a function I need to import

CustomType CustomFunction (CustomType1, CustomType2)

I use DLLImport to import functions. It seems to work as long as the functions all use default types like int, char and others. My question is how will I go around importing functions which use custom types?

This is what I'm doing right now

[DllImport("stapi.dll")]
LPSKYETEK_DEVICE;

[DllImport("stapi.dll")]
static extern int SkyeTek_DiscoverDevices(LPSKYETEK_DEVICE **lpDevices);

It really is not working at all. Some errors include the ff
- "The type of namespace name 'LPSKYETEK_DEVI CE' could not be found (are you missing a using directive or an assembly reference?)"
- "Cannot take the address of, get the size of, or declare a pointer to a managed type ('LPSKYETEK_DEV ICE')"


I'm using Visual C# Express Edition 2008 on a Windows XP machine. I have .NET 3.5 installed.

I am extremely unfamiliar with Windows Development as all my prior programming work has been with assembly, Java and Matlab. This has also been the first time I used Visual Studio. Thanks for your help!

Paulo

[poldoga]

Any help here? Would really appreciate any input. This has been bugging me for days already. Thanks in advance.