PInvoke with pointers - C++ to C#

Question

The following is a PInvoke block in C++ that I'm trying to convert to C#:

typedef  PVOID   JHANDLE ;
typedef  UINT32  JRET ;

#define JEXPORT __declspec(dllimport) JRET

JEXPORT
JInitialize (
   OUT JHANDLE* ppHandle,
   IN  PVOID       context,  
   IN  UINT32      flags
) ;

I tried the following call, but it threw a PInvokeStackImbalance exception saying that the signatures don't match:

[DllImport("jhi.dll")]
public static extern UInt32 JHI_Initialize(out IntPtr ppHandle, IntPtr context, UInt32 flags);

Obviously a pointer of a pointer is handled different, but I'm not exactly sure how it translates.

Hans Passant · Accepted Answer · 2011-10-24 19:04:46Z

2

You are missing the CallingConvention in your [DllImport] declaration, it is Cdecl.

answered Oct 24, 2011 at 19:04

Hans Passant

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2 Comments

Daniel Over a year ago

Thanks, I always forget about CallingConvention

Zippit Over a year ago

I know this is ancient and the OP's problem doesn't really match mine, but this answer just saved me after many hours of pInvoke hell. You get a vote.

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