All, I was trying to call the API which is defined in the DLL in the c# project. the code looks like below .
[DllImport("twain_32.dll", EntryPoint="#1")]
<Function declaration>
I know there are lots of public types which defined in this twain_32.dll,
and I knew there is function defined in the dll like below .
TW_UINT16 FAR PASCAL DSM_Entry( pTW_IDENTITY pOrigin,
pTW_IDENTITY pDest,
TW_UINT32 DG,
TW_UINT16 DAT,
TW_UINT16 MSG,
TW_MEMREF pData);
I don't know what class should I defined to reference in the c# to represent pTW_IDENTITY
? Is there any tools to export all these type definition to c# class code . like header file .h
in the c++ ? thanks.
There is no tool which would do this automatically, but there is a site called pinvoke.net which offers lots of P/Invoke signatures and examples. For your question, here is the link: TwIdentity (twain_32).
Also, there are open source libraries available which wrap the native functionality into managed classes, like: Saraff.Twain.NET or twain-in-dotnet, so looking at their source code you will probably find all the definitions you need.