2003 add-in in Custom form

GSK · Joined: 28 Aug 2007 Posts: 12

I have created a outlook 2003 add in VS 2005. I am referencing the add-in in
a custom outlook form. I am not able to call the Test method from the from,
am getting the error "object required". Pls find the code below. Kindly help
me in identifiying this issue.
--------------------------------------------------------------------------------------
Add-in Code :
namespace OutlookTest
{
public partial class ThisAddIn
{
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
}
private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
}
public void Test(string Name)
{
MessageBox.Show(Name);
}
}
------------------------------------------------------------------------------------------
Custom form code
Function Item_Open()
Set myObj = Application.COMAddIns.Item("OutlookTest")
myObj.Connect = True
Set oCOMAddinObj = GetObject("","OutlookTest")
oCOMAddinObj.Test("Add-in call") /--Getting error in this line..
End Function
------------------------------------------------------------------------------------------

Archived from group: microsoft>public>outlook>program_forms

Ken Slovak - [MVP - Outlo · Joined: 12 Aug 2007 Posts: 405

There's a lot more you need to do in a VSTO addin to make your addin code
available to outside calls. You need to override
RequestComAddInAutomationService() and provide a dual interface ComVisible
class, among other things.

You need something like this in your ThisAddIn class

private AddinUtilities addinUtilities;

protected override object RequestComAddInAutomationService()
{
if (addinUtilities == null)
{
addinUtilities = new AddinUtilities();
}
return addinUtilities;
}
}

[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
public interface IAddinUtilities
{
void CalledFromOutside();
}

[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]
public class AddinUtilities : IAddinUtilities
{
// Demonstrates a method that can be called from outside the addin.
// This technique can be used to call functions and to read/write
properties.
public void CalledFromOutside()
{
MessageBox.Show("This is a test of an outside call to the COM
addin");
}
}
:
Then your calling code has to be specially formatted:

Dim oAddin

Set oAddin = Application.COMAddins.Item("myAddinProgID") ' myAddinProgID is
the ProgID of the addin
If Not (oAddin Is Nothing) Then
oAddin.Object.CalledFromOutside 'this calls the addin procedure
End If

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm

"GSK" wrote in message @microsoft.com...
>I have created a outlook 2003 add in VS 2005. I am referencing the add-in
>in
> a custom outlook form. I am not able to call the Test method from the
> from,
> am getting the error "object required". Pls find the code below. Kindly
> help
> me in identifiying this issue.
> --------------------------------------------------------------------------------------
> Add-in Code :
> namespace OutlookTest
> {
> public partial class ThisAddIn
> {
> private void ThisAddIn_Startup(object sender, System.EventArgs e)
> {
> }
> private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
> {
> }
> public void Test(string Name)
> {
> MessageBox.Show(Name);
> }
> }
> ------------------------------------------------------------------------------------------
> Custom form code
> Function Item_Open()
> Set myObj = Application.COMAddIns.Item("OutlookTest")
> myObj.Connect = True
> Set oCOMAddinObj = GetObject("","OutlookTest")
> oCOMAddinObj.Test("Add-in call") /--Getting error in this line..
> End Function
> ------------------------------------------------------------------------------------------

GSK · Joined: 28 Aug 2007 Posts: 12

Thanks very much Ken. It worked now after the changes.

"Ken Slovak - [MVP - Outlook]" wrote:

> There's a lot more you need to do in a VSTO addin to make your addin code
> available to outside calls. You need to override
> RequestComAddInAutomationService() and provide a dual interface ComVisible
> class, among other things.
>
> You need something like this in your ThisAddIn class
>
> private AddinUtilities addinUtilities;
>
> protected override object RequestComAddInAutomationService()
> {
> if (addinUtilities == null)
> {
> addinUtilities = new AddinUtilities();
> }
> return addinUtilities;
> }
> }
>
> [ComVisible(true)]
> [InterfaceType(ComInterfaceType.InterfaceIsDual)]
> public interface IAddinUtilities
> {
> void CalledFromOutside();
> }
>
> [ComVisible(true)]
> [ClassInterface(ClassInterfaceType.None)]
> public class AddinUtilities : IAddinUtilities
> {
> // Demonstrates a method that can be called from outside the addin.
> // This technique can be used to call functions and to read/write
> properties.
> public void CalledFromOutside()
> {
> MessageBox.Show("This is a test of an outside call to the COM
> addin");
> }
> }
> :
> Then your calling code has to be specially formatted:
>
> Dim oAddin
>
> Set oAddin = Application.COMAddins.Item("myAddinProgID") ' myAddinProgID is
> the ProgID of the addin
> If Not (oAddin Is Nothing) Then
> oAddin.Object.CalledFromOutside 'this calls the addin procedure
> End If
>
> --
> Ken Slovak
> [MVP - Outlook]
> http://www.slovaktech.com
> Author: Professional Programming Outlook 2007
> Reminder Manager, Extended Reminders, Attachment Options
> http://www.slovaktech.com/products.htm
>
>
> "GSK" wrote in message
> @microsoft.com...
> >I have created a outlook 2003 add in VS 2005. I am referencing the add-in
> >in
> > a custom outlook form. I am not able to call the Test method from the
> > from,
> > am getting the error "object required". Pls find the code below. Kindly
> > help
> > me in identifiying this issue.
> > --------------------------------------------------------------------------------------
> > Add-in Code :
> > namespace OutlookTest
> > {
> > public partial class ThisAddIn
> > {
> > private void ThisAddIn_Startup(object sender, System.EventArgs e)
> > {
> > }
> > private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
> > {
> > }
> > public void Test(string Name)
> > {
> > MessageBox.Show(Name);
> > }
> > }
> > ------------------------------------------------------------------------------------------
> > Custom form code
> > Function Item_Open()
> > Set myObj = Application.COMAddIns.Item("OutlookTest")
> > myObj.Connect = True
> > Set oCOMAddinObj = GetObject("","OutlookTest")
> > oCOMAddinObj.Test("Add-in call") /--Getting error in this line..
> > End Function
> > ------------------------------------------------------------------------------------------
>

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