ActiveX Samples Don't Work

Question

I tried the VB.NET ActiveX sample and I get a System.Runtime.InteropServices.COMException "The server threw an exception" when it tries to set the ClassID property.  I checked my registry and the class is regestered.  Why would the sample program not work (I'm on B1 2005)?

Answer 1

Hi Ben,
we use ActiveX with C# on 2005A and it works fine. He some sample code to assign the control:
In the sample we use 2 Controls (binding at controlItem and sourceItem) which communicate with each other:
In the form-defining XML we have something like this:
<items>
     <action type="add">
          <Item description="" disp_desc="0" enabled="1" from_pane="0" height="0" left="0" linkto="" right_just="0" tab_order="0" to_pane="0" top="0" type="102" uid="_source" visible="0" width="0" forecolor="-1">
               <AutoManagedAttribute/>
               <specific classid="MySource"/>
          </Item>
          <Item description="" disp_desc="0" enabled="1" from_pane="0" height="400" left="5" linkto="" right_just="0" tab_order="3" to_pane="0" top="5" type="102" uid="_control" visible="1" width="520" forecolor="-1">
               <AutoManagedAttribute/>
               <specific classid="MyControl"/>
          </Item>
     </action>
</items>
In the code like this:
virtual protected void _initActiveX() {
     SAPbouiCOM.Item sourceItem  = form.Items.Item("source");
     SAPbouiCOM.Item controlItem = form.Items.Item("control");
     controlItem.SetAutoManagedAttribute(SAPbouiCOM.BoAutoManagedAttr.ama_Visible, 0,
       SAPbouiCOM.BoModeVisualBehavior.mvb_True);
     SAPbouiCOM.ActiveX axSource  = (SAPbouiCOM.ActiveX)sourceItem.Specific;
     SAPbouiCOM.ActiveX axControl = (SAPbouiCOM.ActiveX)controlItem.Specific;
     _control = (MyControl)axControl.Object;
     _control.MySource = (MySource)axSource.Object;
I hope this will help you.
Greetings from Berlin
Gerd