if there is a function in a win32 dll, it is definition is
int add(int a, int b);
how to define that function pointer in C#?
thank you very much!
5  2471 
Hi,
You would use a delegate.
delegate int AddCallback( int a, int b );
Hope this helps
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:eN******** ******@TK2MSFTN GP10.phx.gbl... if there is a function in a win32 dll, it is definition is
int add(int a, int b);
how to define that function pointer in C#?
thank you very much!
Thanks,
In C the GetProcAddress can get the function pointer, for example
typedef int (*MYADD)(int, int);
MYADD add = (MYADD) GetProcAddress( hMyLib, "add");
but how to pass the function pointer to that delegate?
Thank you very much again!
"Chris Taylor" <ch************ *@hotmail.com> wrote in message
news:Of******** ******@TK2MSFTN GP10.phx.gbl... Hi,
You would use a delegate.
delegate int AddCallback( int a, int b );
Hope this helps
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:eN******** ******@TK2MSFTN GP10.phx.gbl... if there is a function in a win32 dll, it is definition is
int add(int a, int b);
how to define that function pointer in C#?
thank you very much!
Hi,
If you are going to bind statically to the function then you could use
interop aka P/Invoke from the System.Runtime. InteropServices name space.
[DllImport("dlln ame.dll")]
public int Add( int a, int b );
If you want to do this dynamically it is a little more work, I believe there
is a solution using the Relection Emit however I would rather want to test
this before commiting to it here :). But in principal, an I believe this
should answer your other post as well. You could use the Reflection classes
to create a temporary Assembly that can use interop to load the function and
use the Reflection Emit to create a .NET function which would perform the
actual invocation of the method. Being 5:31 in the morning I might just be
dreaming here but if I get a chance I will give it a try and post my
results.
The following is a more hardcoded approach to what I am suggesting, it might
get you going http://groups.google.com/groups?hl=e...40TK2MSFTNGP10
Cheers
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:uY******** ******@tk2msftn gp13.phx.gbl... Thanks,
In C the GetProcAddress can get the function pointer, for example
typedef int (*MYADD)(int, int);
MYADD add = (MYADD) GetProcAddress( hMyLib, "add");
but how to pass the function pointer to that delegate?
Thank you very much again!
"Chris Taylor" <ch************ *@hotmail.com> wrote in message
news:Of******** ******@TK2MSFTN GP10.phx.gbl... Hi,
You would use a delegate.
delegate int AddCallback( int a, int b );
Hope this helps
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:eN******** ******@TK2MSFTN GP10.phx.gbl... if there is a function in a win32 dll, it is definition is
int add(int a, int b);
how to define that function pointer in C#?
thank you very much!
Wah!!! great, you are really an expert.
Thank you very much!
"Chris Taylor" <ch************ *@hotmail.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. .. Hi,
If you are going to bind statically to the function then you could use
interop aka P/Invoke from the System.Runtime. InteropServices name space.
[DllImport("dlln ame.dll")]
public int Add( int a, int b );
If you want to do this dynamically it is a little more work, I believe
there is a solution using the Relection Emit however I would rather want to test
this before commiting to it here :). But in principal, an I believe this
should answer your other post as well. You could use the Reflection
classes to create a temporary Assembly that can use interop to load the function
and use the Reflection Emit to create a .NET function which would perform the
actual invocation of the method. Being 5:31 in the morning I might just be
dreaming here but if I get a chance I will give it a try and post my
results.
The following is a more hardcoded approach to what I am suggesting, it
might get you going
http://groups.google.com/groups?hl=e...40TK2MSFTNGP10
Cheers
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:uY******** ******@tk2msftn gp13.phx.gbl... Thanks,
In C the GetProcAddress can get the function pointer, for example
typedef int (*MYADD)(int, int);
MYADD add = (MYADD) GetProcAddress( hMyLib, "add");
but how to pass the function pointer to that delegate?
Thank you very much again!
"Chris Taylor" <ch************ *@hotmail.com> wrote in message
news:Of******** ******@TK2MSFTN GP10.phx.gbl... Hi,
You would use a delegate.
delegate int AddCallback( int a, int b );
Hope this helps
Chris Taylor
"ZhangZQ" <zh*******@hotm ail.com> wrote in message
news:eN******** ******@TK2MSFTN GP10.phx.gbl...
> if there is a function in a win32 dll, it is definition is
>
> int add(int a, int b);
>
>
> how to define that function pointer in C#?
>
>
> thank you very much!
>
>
> In C the GetProcAddress can get the function pointer, for example
typedef int (*MYADD)(int, int);
MYADD add = (MYADD) GetProcAddress( hMyLib, "add");
but how to pass the function pointer to that delegate?
In addition to what Chris Taylor posted, I thought you might also be
interested in http://www.bearcanyon.com/dotnet/#getprocaddress, this sounds
pretty similar to what you want to achieve.
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how to define that function pointer in C#?
thank you very much!
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