Hi folks,
I have some serious problems with one of the API calls ...
I try to use :
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.Interf ace)]object ppvObject);
public struct UUID
{
public long Data1;
public int Data2;
public int Data3;
[MarshalAs(Unman agedType.ByValA rray,SizeConst= 8)]
public byte[] Data4;
}
public static void TestAA()
{
UUID uid;
uid.Data1 = (long)0x618736e 0;
uid.Data2 = (int)0x3c3d;
uid.Data3 = (int)0x11cf;
uid.Data4 = new Byte[8];
uid.Data4[0] = (byte)0x81;
uid.Data4[1] = (byte)0x0c;
uid.Data4[2] = (byte)0x00;
uid.Data4[3] = (byte)0xaa;
uid.Data4[4] = (byte)0x00;
uid.Data4[5] = (byte)0x38;
uid.Data4[6] = (byte)0x9b;
uid.Data4[7] = (byte)0x71;
IAccessible accObj = null;
long ret = AccessibleObjec tFromWindow
(wHandle,OBJID_ WINDOW,uid,accO bj);
but always get a E_INVALIDARG return value.
I also tried
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.AsAny)]object ppvObject);
could someone give me a hint where I make my mistake ?
thx :)
Sven
4  6496 
Hint .... long is 64 bit in .NET
Willy.
"Sven Gnagi" <Sv*******@hotm ail.com> wrote in message
news:0b******** *************** *****@phx.gbl.. . Hi folks,
I have some serious problems with one of the API calls ...
I try to use :
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.Interf ace)]object ppvObject);
public struct UUID
{
public long Data1;
public int Data2;
public int Data3;
[MarshalAs(Unman agedType.ByValA rray,SizeConst= 8)]
public byte[] Data4;
}
public static void TestAA()
{
UUID uid;
uid.Data1 = (long)0x618736e 0;
uid.Data2 = (int)0x3c3d;
uid.Data3 = (int)0x11cf;
uid.Data4 = new Byte[8];
uid.Data4[0] = (byte)0x81;
uid.Data4[1] = (byte)0x0c;
uid.Data4[2] = (byte)0x00;
uid.Data4[3] = (byte)0xaa;
uid.Data4[4] = (byte)0x00;
uid.Data4[5] = (byte)0x38;
uid.Data4[6] = (byte)0x9b;
uid.Data4[7] = (byte)0x71;
IAccessible accObj = null;
long ret = AccessibleObjec tFromWindow
(wHandle,OBJID_ WINDOW,uid,accO bj);
but always get a E_INVALIDARG return value.
I also tried
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.AsAny)]object ppvObject);
could someone give me a hint where I make my mistake ?
thx :)
Sven
Sven, [DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.Interf ace)]object ppvObject);
I would declare it as
[DllImport("olea cc.dll", PreserveSig=fal se)]
[return: MarshalAs(Unman agedType.Interf ace)]
public static extern object AccessibleObjec tFromWindow (
IntPtr hwnd,
uint dwId,
ref Guid riid);
And call it with
Guid uid = new Guid("618736e0-3c3d-11cf-810c-00aa00389b71");
IAccessible accObj = (IAccessible)Ac cessibleObjectF romWindow(wHand le,
OBJID_WINDOW, ref uid);
Mattias
--
Mattias Sjögren [MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/
Please reply only to the newsgroup. -----Original Message-----
Sven,
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.Interf ace)]object ppvObject);
I would declare it as
[DllImport("olea cc.dll", PreserveSig=fal se)]
[return: MarshalAs(Unman agedType.Interf ace)]
public static extern object AccessibleObjec tFromWindow (
IntPtr hwnd,
uint dwId,
ref Guid riid);
And call it with
Guid uid = new Guid("618736e0-3c3d-11cf-810c-
00aa00389b71");IAccessible accObj = (IAccessible)
AccessibleObjec tFromWindow(wHa ndle,OBJID_WINDOW , ref uid);
Mattias
--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.
.
Hi Mattias,
what to say...... you just became my personal hero :)
works perfectly...... and I'd never have thought about
Guid uid = new Guid("618736e0-3c3d-11cf-810c-
00aa00389b71") by myself ....
thx a lot :)
Sven -----Original Message-----
Sven,
[DllImport("olea cc.dll",CharSet =CharSet.Auto)]
public static extern long AccessibleObjec tFromWindow (
long hwnd,
long dwId,
[MarshalAs(Unman agedType.Struct )]UUID riid,
[MarshalAs(Unman agedType.Interf ace)]object ppvObject);
I would declare it as
[DllImport("olea cc.dll", PreserveSig=fal se)]
[return: MarshalAs(Unman agedType.Interf ace)]
public static extern object AccessibleObjec tFromWindow (
IntPtr hwnd,
uint dwId,
ref Guid riid);
And call it with
Guid uid = new Guid("618736e0-3c3d-11cf-810c-
00aa00389b71");IAccessible accObj = (IAccessible)
AccessibleObjec tFromWindow(wHa ndle,OBJID_WINDOW , ref uid);
Mattias
--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.
.
Hi Mattias,
what to say...... you just became my personal hero :)
works perfectly...... and I'd never have thought about
Guid uid = new Guid("618736e0-3c3d-11cf-810c-
00aa00389b71") by myself ....
thx a lot :)
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