Re: P/Invoke BYTE *

From: "Mario" <alphatommy@xxxxxxxxxxx>
Date: 27 Jul 2006 16:08:51 -0700

Hi Paul,

Your suggestion worked great. Thanks.

I have another question. How would the declaration different if the
function needs a call back. I want the driver (dll function) to return
value to pDataBuffer. Thanks.

Paul G. Tobey [eMVP] wrote:

I think that you want that to be a byte array.

public static extern void myfunction(IntPtr myhandle, Byte byAddress,
byte[] pDataBuffer, int iSize);

Paul T.

"Mario" <alphatommy@xxxxxxxxxxx> wrote in message
news:1153946653.546113.166310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Hi,

I have this function in a dll

void myfunction (HANDLE myhandle, BYTE byAddress, BYTE* pDataBuffer,
int iSize)

Invoking using Platform invoke by using the following:

[DllImport("mydll.dll")]
public static extern void myfunction(IntPtr myhandle, Byte byAddress,
ref Byte pDataBuffer, int iSize);

Somehow I don't seem to be getting data from pDataBuffer. What is the
right declaration for BYTE * in platform invoke?

Thanks.

Follow-Ups:
- Re: P/Invoke BYTE *
  - From: Paul G. Tobey [eMVP]
- Re: P/Invoke BYTE *
  - From: <ctacke/>

References:
- P/Invoke BYTE *
  - From: Mario
- Re: P/Invoke BYTE *
  - From: Paul G. Tobey [eMVP]

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Relevant Pages

Re: P/Invoke BYTE *
... Paul G. Tobey wrote: ... value to pDataBuffer. ... bytepDataBuffer, int iSize); ...
(microsoft.public.dotnet.framework.compactframework)
Re: P/Invoke BYTE *
... value to pDataBuffer. ... public static extern void myfunction(IntPtr myhandle, Byte byAddress, ... bytepDataBuffer, int iSize); ...
(microsoft.public.dotnet.framework.compactframework)
Re: P/Invoke BYTE *
... It won't change - a byte array is passed by ref, so your driver can write to ... value to pDataBuffer. ... bytepDataBuffer, int iSize); ...
(microsoft.public.dotnet.framework.compactframework)
Re: P/Invoke BYTE *
... public static extern void myfunction(IntPtr myhandle, Byte byAddress, ... bytepDataBuffer, int iSize); ... void myfunction (HANDLE myhandle, BYTE byAddress, BYTE* pDataBuffer, ...
(microsoft.public.dotnet.framework.compactframework)