SolidEdgeTopLevelAsmOpener/SolidEdgeAppHelper.cs at master · ChrisClems/SolidEdgeTopLevelAsmOpener · GitHub

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using System;
using System.Runtime.InteropServices;
using System.Threading;

namespace SolidEdgeTopLevelAsmOpener
{
    using SolidEdge.Framework.Interop;

        #region OleMessageFilter

    internal class OleMessageFilter : IOleMessageFilter
    {
        public static void Register()
        {
            IOleMessageFilter newFilter = new OleMessageFilter();
            IOleMessageFilter oldFilter = null;

            if (Thread.CurrentThread.GetApartmentState() == ApartmentState.STA)
                CoRegisterMessageFilter(newFilter, out oldFilter);
            else
                throw new COMException(
                    "Unable to register message filter because the current thread apartment state is not STA.");
        }

        public static void Revoke()
        {
            IOleMessageFilter oldFilter = null;
            CoRegisterMessageFilter(null, out oldFilter);
        }

        int IOleMessageFilter.HandleInComingCall(
            int dwCallType,
            IntPtr hTaskCaller,
            int dwTickCount,
            IntPtr lpInterfaceInfo)
        {
            return (int)SERVERCALL.SERVERCALL_ISHANDLED;
        }

        int IOleMessageFilter.RetryRejectedCall(
            IntPtr hTaskCallee,
            int dwTickCount,
            int dwRejectType)
        {
            if (dwRejectType == (int)SERVERCALL.SERVERCALL_RETRYLATER) return 99;

            return -1;
        }

        int IOleMessageFilter.MessagePending(
            IntPtr hTaskCallee,
            int dwTickCount,
            int dwPendingType)
        {
            return (int)PENDINGMSG.PENDINGMSG_WAITDEFPROCESS;
        }

        [DllImport("Ole32.dll")]
        private static extern int CoRegisterMessageFilter(
            IOleMessageFilter newFilter,
            out IOleMessageFilter oldFilter);
    }

    internal enum SERVERCALL
    {
        SERVERCALL_ISHANDLED = 0,
        SERVERCALL_REJECTED = 1,
        SERVERCALL_RETRYLATER = 2
    }

    internal enum PENDINGMSG
    {
        PENDINGMSG_CANCELCALL = 0,
        PENDINGMSG_WAITNOPROCESS = 1,
        PENDINGMSG_WAITDEFPROCESS = 2
    }

    [ComImport()]
    [Guid("00000016-0000-0000-C000-000000000046")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IOleMessageFilter
    {
        [PreserveSig]
        int HandleInComingCall(
            int dwCallType,
            IntPtr hTaskCaller,
            int dwTickCount,
            IntPtr lpInterfaceInfo);

        [PreserveSig]
        int RetryRejectedCall(
            IntPtr hTaskCallee,
            int dwTickCount,
            int dwRejectType);

        [PreserveSig]
        int MessagePending(
            IntPtr hTaskCallee,
            int dwTickCount,
            int dwPendingType);
    }

    #endregion

    public static class SEAppHelper
    {
        internal static bool SEIsRunningForeground(out Application SEApp)
        {
            try
            {
                SEApp = (Application)Marshal.GetActiveObject("SolidEdge.Application");
                SEApp.DisplayAlerts = true;
                SEApp.ResumeMRU();
                SEApp.DelayCompute = false;
                SEApp.Interactive = true;
                SEApp.ScreenUpdating = true;
                SEApp.Visible = true;
                return true;
            }
            catch (Exception)
            {
                SEApp = null;
                return false;
            }
        }

        internal static Application SEStart()
        {
            try
            {
                var appType = Type.GetTypeFromProgID("SolidEdge.Application");
                var SEApp = (Application)Activator.CreateInstance(appType);
                SEApp.DisplayAlerts = true;
                SEApp.ResumeMRU();
                SEApp.DelayCompute = false;
                SEApp.Interactive = true;
                SEApp.ScreenUpdating = true;
                SEApp.Visible = true;
                return SEApp;
            }
            catch (Exception)
            {
                return null;
            }
        }
    }
}