Use C++ library in C#

  • Thread starter Thread starter shapper
  • Start date Start date
S

shapper

Hello,

I have a DLL and a C/C++ header as follows:

#include <stdio.h>
#include <windows.h>
#define FUNC_DLL __declspec(dllimport)
FUNC_DLL int WINAPI FA(int iSize, double *pdSignal, double dSmooth,
double dPhase, double *pdFilter);
FUNC_DLL int WINAPI FATR(double dSeries, double dSmooth, double
dPhase, double *pdOutput, int iDestroy, int *piSeriesID);

I would like to use these functions in a C# class library.
(A side note: would this be different on Net 2.0 or Net 3.0?)

How can I do this?

Thank You,
Miguel
 
shapper said:
I have a DLL and a C/C++ header as follows:

#include <stdio.h>
#include <windows.h>
#define FUNC_DLL __declspec(dllimport)
FUNC_DLL int WINAPI FA(int iSize, double *pdSignal, double dSmooth,
double dPhase, double *pdFilter);
FUNC_DLL int WINAPI FATR(double dSeries, double dSmooth, double
dPhase, double *pdOutput, int iDestroy, int *piSeriesID);
Click to expand...

Untested:

[DllImport("foobar.dll")]
public static extern int FA(int iSize, ref double pdSignal, double
dSmooth, double dPhase, ref double pdFilter);
[DllImport("foobar.dll")]
public static extern int FATR(double dSeries, double dSmooth, double
dPhase, ref double pdOutput, int iDestroy, ref int piSeriesID);

If the pointer are to arrays instead of single values, then you will
need something slightly different.
I would like to use these functions in a C# class library.
(A side note: would this be different on Net 2.0 or Net 3.0?)
Click to expand...

No.

Arne
 
If the pointer are to arrays instead of single values, then you will
need something slightly different.
Click to expand...

Yes, they are.
1. int iSize = INTEGER
2. double *pdSignal = ARRAY OF DOUBLES
3. double dSmooth = DOUBLE
4. double dPhase = DOUBLE
5. double *pdFilter = ARRAY OF DOUBLES

2 and 5 are time series, i.e., an array with N*1 dimension.
1, 3 and 4 single values. They are the parameters.

I was reading the following:
http://msdn.microsoft.com/en-us/magazine/cc301501.aspx

But I wasn't sure if I could use that because of the arrays.

Do you know what changes do I need?

I haven't use C++ and I am not familiar with it.

Thank You,
Miguel
 
shapper said:
Yes, they are.
1. int iSize = INTEGER
2. double *pdSignal = ARRAY OF DOUBLES
3. double dSmooth = DOUBLE
4. double dPhase = DOUBLE
5. double *pdFilter = ARRAY OF DOUBLES

2 and 5 are time series, i.e., an array with N*1 dimension.
1, 3 and 4 single values. They are the parameters.

I was reading the following:
http://msdn.microsoft.com/en-us/magazine/cc301501.aspx

But I wasn't sure if I could use that because of the arrays.

Do you know what changes do I need?

I haven't use C++ and I am not familiar with it.
Click to expand...

Then try as I showed just with:
double[]
instead of:
ref double

Arne
 
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