IDispatch GetIDsFromNames

[Dominic Godin]

Hi,

I have decleared the IDispatch interface but I'm having trouble using it.


Word.Applicatio n MSWord = new Word.Applicatio nClass();
IDispatch wb = (IDispatch)MSWo rd.WordBasic;
int lcid = System.Globaliz ation.CultureIn fo.CurrentCultu re.LCID;

string[] rgsNames = {"DisableAutoMa cros"};
int[] rgDispId;
Guid nullGUID = Guid.Empty;

int result = wb.GetIDsOfName s(ref nullGUID, rgsNames, 2,
lcid, out rgDispId);

This code sets the result to -1073741819. I can find next to no info on
this error code. Also the rgDispId stays null. What I'm I doing wrong?
Any Ideas?

Dominic Godin

[Mattias Sjögren]

Re: IDispatch GetIDsFromNames

Dominic,
[color=blue]
>This code sets the result to -1073741819. I can find next to no info on
>this error code. Also the rgDispId stays null. What I'm I doing wrong?
>Any Ideas?[/color]

Can you post your IDispatch declaration?

You seem to have one level of indirection too much on the last
parameter, it shouldn't be ref/out since arrays are reference types.



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[Dominic]

Re: IDispatch GetIDsFromNames

Thanks

public interface IDispatch
{
[PreserveSig] int GetTypeInfoCoun t();
UCOMITypeInfo GetTypeInfo(
[MarshalAs(Unman agedType.U4)] int iTInfo,
[MarshalAs(Unman agedType.U4)] int lcid);
[PreserveSig] int GetIDsOfNames(
ref Guid riid,
string[] rgsNames,
[MarshalAs(Unman agedType.U4)] int cNames,
[MarshalAs(Unman agedType.U4)] int lcid,
int[] rgDispId); // this was out, tried ref. Both set
// the array to null
[PreserveSig] int Invoke(
int dispIdMember,
ref Guid riid,
[MarshalAs(Unman agedType.U4)] int lcid,
[MarshalAs(Unman agedType.U4)] int dwFlags,
ref DISPPARAMS pDispParams,
[Out] object[] pVarResult,
ref EXCEPINFO pExcepInfo,
[Out] IntPtr[] pArgErr);
}

With the out removed this still returns an error of -1073741819 and
leaves the rgDispId array untouched.


Mattias Sjögren <mattias.dont.w ant.spam@mvps.o rg> wrote in
news:Oa5C8G7JEH A.3592@TK2MSFTN GP09.phx.gbl:
[color=blue]
> Dominic,
>[color=green]
>>This code sets the result to -1073741819. I can find next to no info
>>on this error code. Also the rgDispId stays null. What I'm I doing
>>wrong? Any Ideas?[/color]
>
> Can you post your IDispatch declaration?
>
> You seem to have one level of indirection too much on the last
> parameter, it shouldn't be ref/out since arrays are reference types.
>
>
>
> Mattias
>[/color]

[Dominic]

Re: IDispatch GetIDsFromNames

Thanks

[Guid("00020400-0000-0000-c000-000000000046")]
[InterfaceType(C omInterfaceType .InterfaceIsIUn known)]
public interface IDispatch
{
[PreserveSig] int GetTypeInfoCoun t();
UCOMITypeInfo GetTypeInfo(
[MarshalAs(Unman agedType.U4)] int iTInfo,
[MarshalAs(Unman agedType.U4)] int lcid);
[PreserveSig] int GetIDsOfNames(
ref Guid riid,
string[] rgsNames,
[MarshalAs(Unman agedType.U4)] int cNames,
[MarshalAs(Unman agedType.U4)] int lcid,
ref int[] rgDispId); // I was using out
[PreserveSig] int Invoke(
int dispIdMember,
ref Guid riid,
[MarshalAs(Unman agedType.U4)] int lcid,
[MarshalAs(Unman agedType.U4)] int dwFlags,
ref DISPPARAMS pDispParams,
[Out] object[] pVarResult,
ref EXCEPINFO pExcepInfo,
[Out] IntPtr[] pArgErr);
}

Still doesn't work mind. Still get the -1073741819 error and the
rgDispId array is left untouched. Any ideas?

PS. Using a crappy newserver so sorry if this is a double post.

Mattias Sjögren <mattias.dont.w ant.spam@mvps.o rg> wrote in
news:Oa5C8G7JEH A.3592@TK2MSFTN GP09.phx.gbl:
[color=blue]
> Dominic,
>[color=green]
>>This code sets the result to -1073741819. I can find next to no info
>>on this error code. Also the rgDispId stays null. What I'm I doing
>>wrong? Any Ideas?[/color]
>
> Can you post your IDispatch declaration?
>
> You seem to have one level of indirection too much on the last
> parameter, it shouldn't be ref/out since arrays are reference types.
>
>
>
> Mattias
>[/color]

[Mattias Sjögren]

Re: IDispatch GetIDsFromNames

[color=blue]
> [PreserveSig] int GetIDsOfNames(
> ref Guid riid,
> string[] rgsNames,
> [MarshalAs(Unman agedType.U4)] int cNames,
> [MarshalAs(Unman agedType.U4)] int lcid,
> ref int[] rgDispId); // I was using out[/color]

It shouldn't be ref either, try it like this

[PreserveSig] int GetIDsOfNames(
ref Guid riid,
[MarshalAs(Unman agedType.LPArra y,
ArraySubType=Un managedType.LPW Str)]
string[] rgsNames,
int cNames,
int lcid,
[MarshalAs(Unman agedType.LPArra y)] int[] rgDispId);



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[Dominic]

Re: IDispatch GetIDsFromNames

That did the trick, thank you ever so much.

Final interface was:

[Guid("00020400-0000-0000-c000-000000000046")]
[InterfaceType(C omInterfaceType .InterfaceIsIUn known)]
public interface IDispatch
{
[PreserveSig] int GetTypeInfoCoun t();
UCOMITypeInfo GetTypeInfo(
[MarshalAs(Unman agedType.U4)] int iTInfo,
[MarshalAs(Unman agedType.U4)] int lcid);
[PreserveSig] int GetIDsOfNames(
ref Guid riid,
[MarshalAs(Unman agedType.LPArra y,
ArraySubType=Un managedType.LPW Str)]
string[] rgsNames,
int cNames,
int lcid,
[MarshalAs(Unman agedType.LPArra y)] int[] rgDispId);
[PreserveSig] int Invoke(
int dispIdMember,
ref Guid riid,
[MarshalAs(Unman agedType.U4)] int lcid,
[MarshalAs(Unman agedType.U4)] int dwFlags,
ref DISPPARAMS pDispParams,
[MarshalAs(Unman agedType.LPArra y)][Out] object[]
pVarResult,
ref EXCEPINFO pExcepInfo,
[MarshalAs(Unman agedType.LPArra y)][Out] IntPtr[]
pArgErr);
}

Thanks again.

Dominic Godin