Run a .dll in C#

[Leif]

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Subject: Run a .dll in C#
From: "Leif" <[email protected]> Sent: 7/21/2003
6:05:01 AM




I am trying to reproduce a VB6 application in C#. the VB
program extracts the data froma .wav file and sends it
(or calls, not really sure of the proper terminology) to
a .dll file which then uses the information.

the following VB code seems to accomplish this task but I
am having a hard time finding instructions on similar code
for C#. any assistance (examples, sample code, articles
etc) would be greatly appreciated.

here is the VB code:

Private Declare Sub FFTSingle Lib "C:\FFT.dll"
Alias "fft_float" _
(ByVal NumSamples As Long, ByVal InverseTransform As
Boolean, RealIn As Single, _
ImagIn As Single, RealOut As Single, ImagOut As Single)


the following command is used in a separate event:

FFTSingle 8192, False, RealIn(1), ImagIn(1), RealOut(1),
ImagOut(1)

Thanks for the assistance,

 

[Gabriel Esparza-Romero [MSFT]]

Hi

The C# equivalent would be more or less this:

[DllImport("C:\\FFT.dll")]
private static extern void FFTSingle (long NumSamples, bool InverseTransform, IntPtr RealIn, IntPtr ImagIn, ref IntPtr RealOut, ref IntPtr ImagOut);

I'm guessing the direction of the last four parameters as well as the type. You will need to add a using clause for the System.Runtime.InteropServices
namespace.

hope this helps

--------------------

 

[Leif]

thnaks

-----Original Message-----
Hi

The C# equivalent would be more or less this:

[DllImport("C:\\FFT.dll")]
private static extern void FFTSingle (long NumSamples,

bool InverseTransform, IntPtr RealIn, IntPtr ImagIn, ref
IntPtr RealOut, ref IntPtr ImagOut);

I'm guessing the direction of the last four parameters as

well as the type. You will need to add a using clause for
the System.Runtime.InteropServices

namespace.

hope this helps

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