I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its just
normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters are
NOT set, yet with ThisCall, they are set ok, or appear to be. I find it odd.
Thanks
12  2151 
Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not out.
Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl... I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its just
normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters are
NOT set, yet with ThisCall, they are set ok, or appear to be. I find it
odd.
Thanks
Nop, I tried ref and it doesnt help, the only way i can get it to return
values is with thiscall.
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:#p******** ******@TK2MSFTN GP11.phx.gbl... Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not out.
Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl... I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its
just normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters
are NOT set, yet with ThisCall, they are set ok, or appear to be. I find it
odd.
Thanks
So i should use Int32 for the parameters instead of long?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:#p******** ******@TK2MSFTN GP11.phx.gbl... Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not out.
Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl... I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its
just normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters
are NOT set, yet with ThisCall, they are set ok, or appear to be. I find it
odd.
Thanks
I also have a problem with "ref" paramaters, it says they need to be
assigned to before used
Yet i have them used as "ref" in dll extern calls and checked for non NULL
after yet it complains for non assignment so i use a local copy.
Isnt it smart enough to detect that its being assinged in an extern dll call
as declared in DllImport?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:#p******** ******@TK2MSFTN GP11.phx.gbl... Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not out.
Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl... I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its
just normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters
are NOT set, yet with ThisCall, they are set ok, or appear to be. I find it
odd.
Thanks
i mean "out" oops.
ref in the same dll wrapper still gets the output but only with thiscall
convention.
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:OQ******** ******@TK2MSFTN GP09.phx.gbl... I also have a problem with "ref" paramaters, it says they need to be
assigned to before used
Yet i have them used as "ref" in dll extern calls and checked for non NULL
after yet it complains for non assignment so i use a local copy.
Isnt it smart enough to detect that its being assinged in an extern dll
call as declared in DllImport?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote in message news:#p******** ******@TK2MSFTN GP11.phx.gbl... Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not out.
Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl... I am calling an unmanaged DLL like follows in a Class wrapper.
namespace blah
{
[DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
CallingConventi on=CallingConve ntion.ThisCall]
public static extern void blahFn(out long blah, out long blah2);
class sealed ClassBlah
{
private ClassBlah()
{
}
}
}
Why have I to call this with the CallingConventi on of ThisCall, its just normal "C" functions in a DLL. Why wont StdCall work?
What happens with other calling conventions is that the out parameters are NOT set, yet with ThisCall, they are set ok, or appear to be. I find
it odd.
Thanks
If you could post the original function declaration, it would help
tremendously.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:e6******** ******@TK2MSFTN GP09.phx.gbl... i mean "out" oops.
ref in the same dll wrapper still gets the output but only with thiscall
convention.
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:OQ******** ******@TK2MSFTN GP09.phx.gbl... I also have a problem with "ref" paramaters, it says they need to be
assigned to before used
Yet i have them used as "ref" in dll extern calls and checked for non
NULL after yet it complains for non assignment so i use a local copy.
Isnt it smart enough to detect that its being assinged in an extern dll
call as declared in DllImport?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote in message news:#p******** ******@TK2MSFTN GP11.phx.gbl... Mr. Tickle,
What is the declaration of the original function? If it takes a
pointer, then you should be using "ref" for the parameters, and not
out. Also, does the function take a 64-bit integer? Long in C is a 32-bit
integer, where in .NET it is a 64-bit integer.
The STDCALL mechanism should work if you are using it.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:Oo******** ******@TK2MSFTN GP09.phx.gbl...
> I am calling an unmanaged DLL like follows in a Class wrapper.
>
> namespace blah
> {
> [DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
> CallingConventi on=CallingConve ntion.ThisCall]
> public static extern void blahFn(out long blah, out long blah2);
>
> class sealed ClassBlah
> {
> private ClassBlah()
> {
> }
>
> }
> }
>
> Why have I to call this with the CallingConventi on of ThisCall, its
just > normal "C" functions in a DLL. Why wont StdCall work?
>
> What happens with other calling conventions is that the out
parameters are > NOT set, yet with ThisCall, they are set ok, or appear to be. I find
it odd.
>
>
>
> Thanks
>
>
It would but I dont have it, its in a dll i have to call into. Not mine.
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:OB******** ******@TK2MSFTN GP11.phx.gbl... If you could post the original function declaration, it would help
tremendously.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:e6******** ******@TK2MSFTN GP09.phx.gbl... i mean "out" oops.
ref in the same dll wrapper still gets the output but only with thiscall
convention.
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:OQ******** ******@TK2MSFTN GP09.phx.gbl... I also have a problem with "ref" paramaters, it says they need to be
assigned to before used
Yet i have them used as "ref" in dll extern calls and checked for non NULL after yet it complains for non assignment so i use a local copy.
Isnt it smart enough to detect that its being assinged in an extern
dll call as declared in DllImport?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote in message news:#p******** ******@TK2MSFTN GP11.phx.gbl...
> Mr. Tickle,
>
> What is the declaration of the original function? If it takes a
> pointer, then you should be using "ref" for the parameters, and not out. > Also, does the function take a 64-bit integer? Long in C is a
32-bit > integer, where in .NET it is a 64-bit integer.
>
> The STDCALL mechanism should work if you are using it.
>
> Hope this helps.
>
>
> --
> - Nicholas Paldino [.NET/C# MVP]
> - ni************* *@exisconsultin g.com
>
> "Mr.Tickle" <Mr******@mrmen .com> wrote in message
> news:Oo******** ******@TK2MSFTN GP09.phx.gbl...
> > I am calling an unmanaged DLL like follows in a Class wrapper.
> >
> > namespace blah
> > {
> > [DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
> > CallingConventi on=CallingConve ntion.ThisCall]
> > public static extern void blahFn(out long blah, out long blah2);
> >
> > class sealed ClassBlah
> > {
> > private ClassBlah()
> > {
> > }
> >
> > }
> > }
> >
> > Why have I to call this with the CallingConventi on of ThisCall,
its just
> > normal "C" functions in a DLL. Why wont StdCall work?
> >
> > What happens with other calling conventions is that the out parameters are
> > NOT set, yet with ThisCall, they are set ok, or appear to be. I
find it > odd.
> >
> >
> >
> > Thanks
> >
> >
>
>
typedef SOME_ID long
SOME_ID someFn(SOME_ID* someIDhere, SOME_ID* someIDhere2, SOME_ID*
someIDhere3);
something like that.
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:OB******** ******@TK2MSFTN GP11.phx.gbl... If you could post the original function declaration, it would help
tremendously.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:e6******** ******@TK2MSFTN GP09.phx.gbl... i mean "out" oops.
ref in the same dll wrapper still gets the output but only with thiscall
convention.
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:OQ******** ******@TK2MSFTN GP09.phx.gbl... I also have a problem with "ref" paramaters, it says they need to be
assigned to before used
Yet i have them used as "ref" in dll extern calls and checked for non NULL after yet it complains for non assignment so i use a local copy.
Isnt it smart enough to detect that its being assinged in an extern
dll call as declared in DllImport?
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote in message news:#p******** ******@TK2MSFTN GP11.phx.gbl...
> Mr. Tickle,
>
> What is the declaration of the original function? If it takes a
> pointer, then you should be using "ref" for the parameters, and not out. > Also, does the function take a 64-bit integer? Long in C is a
32-bit > integer, where in .NET it is a 64-bit integer.
>
> The STDCALL mechanism should work if you are using it.
>
> Hope this helps.
>
>
> --
> - Nicholas Paldino [.NET/C# MVP]
> - ni************* *@exisconsultin g.com
>
> "Mr.Tickle" <Mr******@mrmen .com> wrote in message
> news:Oo******** ******@TK2MSFTN GP09.phx.gbl...
> > I am calling an unmanaged DLL like follows in a Class wrapper.
> >
> > namespace blah
> > {
> > [DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
> > CallingConventi on=CallingConve ntion.ThisCall]
> > public static extern void blahFn(out long blah, out long blah2);
> >
> > class sealed ClassBlah
> > {
> > private ClassBlah()
> > {
> > }
> >
> > }
> > }
> >
> > Why have I to call this with the CallingConventi on of ThisCall,
its just
> > normal "C" functions in a DLL. Why wont StdCall work?
> >
> > What happens with other calling conventions is that the out parameters are
> > NOT set, yet with ThisCall, they are set ok, or appear to be. I
find it > odd.
> >
> >
> >
> > Thanks
> >
> >
>
>
Mr.Tickle,
In this case, you definitely want to use the int type, and pass it by
reference. Your declaration should look like this:
[DllImport("some dll.dll")]
public static extern int someFn(ref int someIDhere, ref int someIDhere2, ref
int someIDhere3);
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. typedef SOME_ID long
SOME_ID someFn(SOME_ID* someIDhere, SOME_ID* someIDhere2, SOME_ID*
someIDhere3);
something like that.
"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote in message news:OB******** ******@TK2MSFTN GP11.phx.gbl... If you could post the original function declaration, it would help
tremendously.
--
- Nicholas Paldino [.NET/C# MVP]
- ni************* *@exisconsultin g.com
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:e6******** ******@TK2MSFTN GP09.phx.gbl... i mean "out" oops.
ref in the same dll wrapper still gets the output but only with
thiscall convention.
"Mr.Tickle" <Mr******@mrmen .com> wrote in message
news:OQ******** ******@TK2MSFTN GP09.phx.gbl...
> I also have a problem with "ref" paramaters, it says they need to be
> assigned to before used
>
> Yet i have them used as "ref" in dll extern calls and checked for
non NULL > after yet it complains for non assignment so i use a local copy.
>
> Isnt it smart enough to detect that its being assinged in an extern dll call
> as declared in DllImport?
>
>
>
>
> "Nicholas Paldino [.NET/C# MVP]"
<ni************ **@exisconsulti ng.com> wrote
> in message news:#p******** ******@TK2MSFTN GP11.phx.gbl...
> > Mr. Tickle,
> >
> > What is the declaration of the original function? If it takes
a > > pointer, then you should be using "ref" for the parameters, and
not out. > > Also, does the function take a 64-bit integer? Long in C is a
32-bit > > integer, where in .NET it is a 64-bit integer.
> >
> > The STDCALL mechanism should work if you are using it.
> >
> > Hope this helps.
> >
> >
> > --
> > - Nicholas Paldino [.NET/C# MVP]
> > - ni************* *@exisconsultin g.com
> >
> > "Mr.Tickle" <Mr******@mrmen .com> wrote in message
> > news:Oo******** ******@TK2MSFTN GP09.phx.gbl...
> > > I am calling an unmanaged DLL like follows in a Class wrapper.
> > >
> > > namespace blah
> > > {
> > > [DllImport("DLLN ame.DLL", EntryPoint="Bla hEntryPoint",
> > > CallingConventi on=CallingConve ntion.ThisCall]
> > > public static extern void blahFn(out long blah, out long
blah2); > > >
> > > class sealed ClassBlah
> > > {
> > > private ClassBlah()
> > > {
> > > }
> > >
> > > }
> > > }
> > >
> > > Why have I to call this with the CallingConventi on of ThisCall,
its > just
> > > normal "C" functions in a DLL. Why wont StdCall work?
> > >
> > > What happens with other calling conventions is that the out
parameters > are
> > > NOT set, yet with ThisCall, they are set ok, or appear to be. I find it
> > odd.
> > >
> > >
> > >
> > > Thanks
> > >
> > >
> >
> >
>
>
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