Reference from ITool to Form? (ArcGIS Engine)

Question

I have a custom tool from which I want to update content (textbox, DataGridView, etc.) on the main form.  I am developing in VB.Net but any help is appreciated.  Thanks!

WesBailes · Answer

Thanks for all of the suggestions!  Kirk, your step by step worked perfectly...thanks a bunch!

KirkKuykendall · Answer

oops, sorry, I didn't notice you're talking about arcengine.

When your main form starts up, set IToolBarControl.CustomProperty to your main form.

Expose a getter on your main form that allows access to the form you want your tool to work with.

Add a member variable to your tool that references your main form.

Cast the hook passed to your tool in OnCreate  to IToolBarControl and set the member variable main form reference to the IToolBarControl.CustomProperty.

In the MouseDown (or whatever) access your form via m_MyMainForm.MyOtherForm.SomeProperty.

WesBailes · Answer

Have you thought about adding a reference of your form/window in the custom tool that you developed?

I think that is what I need help with...I can declare a new form (see below), but I'm not sure how to refer to an existing one (the main form in an ArcGIS Engine Standalone app)

Dim myForm As StructureInfoForm = New StructureInfoForm(m_hookHelper)
        myForm.CurrentFeature(CDbl(pRow.Value(pRow.Fields.FindField("uid"))))
        myForm.Show()