Add ActiveX Tab to FeatureManager Design Tree Example (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, reference your ActiveX control file 
//    (click Project > Add Reference > Browse and browse
//    to the folder where the ActiveX control resides and click
//    the ActiveX control file > OK).
// 2. Verify that the specified part document and bitmap exist.
// 3. Replace activex_control_component_declaration and 
//    activex_control_CLSID_or_ProgID with your ActiveX control's 
//    information.
//
// Postconditions:
// 1. Opens the part document and adds a new tab to the 
//    FeatureManager design tree.
//    NOTE: To add a tab to the FeatureManager tree,
//    you must set IModelViewManager::CreateFeatureMgrControl2's
//    WhichPane parameter to swFeatMgrPane_e.swFeatMgrPaneBottom.
// 2. Activates the new tab.
//
// NOTE: Because the part document is used elsewhere,
// do not save changes.
//----------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
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);
            activex_control_component_declaration ctrlBtm = default(activex_control_component_declaration);
            string fileName = null;
            int errors = 0;
            int warnings = 0;
            int activePane = 0;

            fileName = "C:\\Users\\Public\\Documents\\SOLIDWORKS\\SOLIDWORKS 2018\\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,"activex_control_CLSID_or_ProgID", "", "Tab ToolTip", (int)swFeatMgrPane_e.swFeatMgrPaneBottom);
            ctrlBtm = (activex_control_component_declaration)swFeatMgrTabBtm.GetControl();
            activePane = swFeatMgrTabBtm.ActivateView();
        }

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