On Thu, 27 Nov 2003 23:45:04 +0100, Mattias Sjögren wrote:

Here's my code. I'm trying to implement an object that can be used as a
COM object for a button in IE.

Currently, this doesn't work at all... I have all the entries in the
registry for the button (it works when using an .exe to run instead of the
COM object) and I use regasm to register the dll compiled from the
following code. But the moment I hit the button in IE, it just crashes on
me without showing any of the message boxes from my code.

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using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace iebuttontest {
    [Guid ("3C7BA736-716C-4346-806D-714778E3F0CD")]
    public interface IIEPluginTest1 {
        int DoYourJob();
    }

    public struct OLECMD {
        public uint cmdID;
        public uint cmdf;
    }

    [ComImport, Guid("b722bccb-4e68-101b-a2bc-00aa00404770"),
        InterfaceType (ComInterfaceType.InterfaceIsIUnknown)]
    public interface IOleCommandTarget {
        void QueryStatus (
            ref Guid pguidCmdGroup,
            uint cCmds,
            [In, Out, MarshalAs(UnmanagedType.LPArray)] OLECMD[] prgCmds,
            IntPtr CmdText);

        void Exec (
            ref Guid pguidCmdGroup,
            uint nCmdId,
            uint nCmdExecOpt,
            ref object pvaIn,
            ref object pvaOut);
    }

    [Guid ("D985E523-358B-4d60-88D8-684474C910F6")]
    public class IEPluginTest1 : IIEPluginTest1, IOleCommandTarget
    {
        public int DoYourJob () {
            MessageBox.Show ("Doing my job");
            return 0;
        }

        public void QueryStatus(ref Guid pguidCmdGroup, uint cCmds, OLECMD[]
        prgCmds, IntPtr CmdText) {
            MessageBox.Show ("Query status");

               
/*            The following doesn't work because it says I can't assign
            to the left hand side.

            foreach (OLECMD cmd in prgCmds) {
                cmd.cmdf = 3;
            }
*/
           
        }

        public void Exec(ref Guid pguidCmdGroup, uint nCmdId, uint nCmdExecOpt,
        ref object pvaIn, ref object pvaOut) {
            MessageBox.Show ("Execing");

        }
    }
}

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              Oliver Sturm