How do i pass a value to a userdefinedform?

Question

hello all,
we need to pass a string value to an userdefinedform. this value will be used as a sql where clause to a custom matrix that will show a different set of results depending on the where clause.
we are developing an addin using vs2010 and c#.
first of all we created our form, vs2010 created it with its default events.
example:
    [FormAttribute("Forms.Test", "Forms/Test.b1f")]
    class Test : UserFormBase
        /// <summary>
        /// this property stores the
        /// </summary>
        public String WhereClause { get; set; }
        /// <summary>
        /// ctor
        /// </summary>
        public Test()
        /// <summary>
        /// ctor with param
        /// </summary>
        /// <param name="sqlWhere"></param>
        public Test(String sqlWhere)
            //this happens too late
            this.WhereClause = sqlWhere;
        /// <summary>
        /// Initialize components. Called by framework after form created.
        /// </summary>
        public override void OnInitializeComponent()
            this.EditText0 = ((SAPbouiCOM.EditText)(this.GetItem("Item_0").Specific));
            this.OnCustomInitialize();
        /// <summary>
        /// Initialize form event. Called by framework before form creation.
        /// </summary>
        public override void OnInitializeFormEvents()
            //events are hooked
        private SAPbouiCOM.EditText EditText0;
        private void OnCustomInitialize()
            //we build the matrix
            string sqlSelect = "SELECT CODE,NAME FROM OUOM WHERE 1=1 ";
            //we want to filter here... but our property WhereClause
            if (!String.IsNullOrEmpty(this.WhereClause) )
                sqlSelect = sqlSelect + " " + this.WhereClause;
            //we fill the matrix with data
            dataTable.executeQuery(sqlSelect);
our problem is that when we hit OnCustomInitialize Event our WhereClause Property is null.
This happens because form constructor method occurs after OnCustomInitialize  ( event that we use to fill our matrix ), so the custom whereclause is always null.
we can't find an event that occurs after the form constructor, our public string property is always null and we can't filter the results.
we create the form using this code
Forms.Test udms = new Forms.Test(" AND CODE LIKE 'A%'");
udms.Show();
any help or hint is really appreciated
thanks in advance

Answer 1

thanks Pedro... too bad we can't use it yet...
public abstract class FormBase
        protected FormBase();
        public bool Alive { get; }
        public string FormType { get; }
        public bool Initialized { get; }
        public IForm UIAPIRawForm { get; }
        public event FormBase.ActivateAfterHandler ActivateAfter;
        public event FormBase.ActivateBeforeHandler ActivateBefore;
        public event FormBase.ClickAfterHandler ClickAfter;
        public event FormBase.ClickBeforeHandler ClickBefore;
        public event FormBase.CloseAfterHandler CloseAfter;
        public event FormBase.CloseBeforeHandler CloseBefore;
        public event FormBase.DataAddAfterHandler DataAddAfter;
        public event FormBase.DataAddBeforeHandler DataAddBefore;
        public event FormBase.DataDeleteAfterHandler DataDeleteAfter;
        public event FormBase.DataDeleteBeforeHandler DataDeleteBefore;
        public event FormBase.DataLoadAfterHandler DataLoadAfter;
        public event FormBase.DataLoadBeforeHandler DataLoadBefore;
        public event FormBase.DataUpdateAfterHandler DataUpdateAfter;
        public event FormBase.DataUpdateBeforeHandler DataUpdateBefore;
        public event FormBase.DeactivateAfterHandler DeactivateAfter;
        public event FormBase.DeactivateBeforeHandler DeactivateBefore;
        public event FormBase.KeyDownAfterHandler KeyDownAfter;
        public event FormBase.KeyDownBeforeHandler KeyDownBefore;
        public event FormBase.LayoutKeyAfterHandler LayoutKeyAfter;
        public event FormBase.LayoutKeyBeforeHandler LayoutKeyBefore;
        public event FormBase.LoadAfterHandler LoadAfter;
        public event FormBase.LoadBeforeHandler LoadBefore;
        public event FormBase.MenuHighlightAfterHandler MenuHighlightAfter;
        public event FormBase.MenuHighlightBeforeHandler MenuHighlightBefore;
        public event FormBase.PrintAfterHandler PrintAfter;
        public event FormBase.PrintBeforeHandler PrintBefore;
        public event FormBase.ReportDataAfterHandler ReportDataAfter;
        public event FormBase.ReportDataBeforeHandler ReportDataBefore;
        public event FormBase.ResizeAfterHandler ResizeAfter;
        public event FormBase.ResizeBeforeHandler ResizeBefore;
        public event FormBase.RightClickAfterHandler RightClickAfter;
        public event FormBase.RightClickBeforeHandler RightClickBefore;
        public event FormBase.UnloadAfterHandler UnloadAfter;
        public event FormBase.UnloadBeforeHandler UnloadBefore;
        public event FormBase.VisibleAfterHandler VisibleAfter;
no event from_draw defined..
btw thanks.. we'll probably refresh the grid twice.. it's not performance savy but i understand that in this environment we have to arrange things.. as documentation is really lacking..
as always thank you all for the suggestions and answers...