Add ActiveX Tab to FeatureManager Design Tree (C#)

This example shows how to add a tab to the FeatureManager design tree, using an on-disk bitmap file for the tab's icon.

//----------------------------------------------------------
// Preconditions:
// 1. In the IDE:
//    a. Reference Microsoft Calendar Control's ActiveX control
//       file (click Project > Add Reference > Browse tab).
//    b. Browse to:
//       c:\Program Files\Microsoft Office\Office12\MSCAL.OCX
//       and click OK.
// 2. Specified part document and bitmap exist.
//
// Postconditions:
// 1. A new tab is added to the FeatureManager design tree
//    with a Microsoft Calendar Control background of red.
//
//    NOTE: To add a tab to the FeatureManager tree,
//    you must set IModelViewManager::CreateFeatureMgrControl2's
//    WhichPane parameter to swFeatMgrPane_e.swFeatMgrPaneBottom.
//
// 2. The new tab is active.
//
// NOTE: Because the part document is used elsewhere,
// do not save any changes when closing it.
//----------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using MSACAL;

namespace AddTabFeatureManagerDesignTreeCSharp.csproj
{
    partial class SolidWorksMacro
    {
        public void Main()
        {
            const string iconSmall = "C:\\Program Files\\SolidWorks Corp\\SolidWorks\\data\\user macro icons\\button.bmp";

            ModelDoc2 swModel = default(ModelDoc2);
            ModelViewManager swModViewMgr = default(ModelViewManager);
            FeatMgrView swFeatMgrTabBtm = default(FeatMgrView);
            MSACAL.Calendar ctrlBtm = default(MSACAL.Calendar);
            string fileName = null;
            int errors = 0;
            int warnings = 0;
            int activePane = 0;

            fileName = "c:\\Program Files\\SolidWorks Corp\\SolidWorks\\samples\\tutorial\\fillets\\knob.sldprt";
            swModel = (ModelDoc2)swApp.OpenDoc6(fileName, (int)swDocumentTypes_e.swDocPART, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, "", ref errors, ref warnings);

            swModViewMgr = (ModelViewManager)swModel.ModelViewManager;

            // Create new tab
            swFeatMgrTabBtm = (FeatMgrView)swModViewMgr.CreateFeatureMgrControl2(iconSmall, "MSCAL.Calendar", "", "Tab ToolTip", (int)swFeatMgrPane_e.swFeatMgrPaneBottom);
            ctrlBtm = (MSACAL.Calendar)swFeatMgrTabBtm.GetControl();
            ctrlBtm.BackColor = 255; //red

            activePane = swFeatMgrTabBtm.ActivateView();
        }

        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>

        public SldWorks swApp;

    }
}