Flash Datagridcolumn visability issue

Sure,

When my form loaded I just it call this function

function formOnLoad()

{

            import mx.controls.DataGrid;
            import mx.controls.gridclasses.DataGridColumn;

          _root.RespondentList.getColumnAt(2).visible = false;

          alert(_root.RespondentList.getColumnAt(2).headerText + ' is visible (T or F): ' +_root.RespondentList.getColumnAt(2).visible);

}

It would report that the column was not visible, but it actually was. I also tried with the variant

_root.RespondentList.getColumnAt(2)._visible = false;

but that didn't do any good either. I tried some other variations of that (most too stupid to even note here), but all had the same result, a completly visible column. So I just found a way around it. Basically just find how how many columns I had at the beginning, and add them as needed. Then when I need to change the columns, remove all the old ones (by deleteing from the current count to what the count was at the start) and create the new ones. Less efficient, but it works. If you care, my whole function for that was

          function renameColumns()
          {
          
               // See if there is a number of quota columns defined. If so, delete that many columns, if not, set it to 0
               if(_global.NumberOfDataCols== undefined)
               {
                    _global.NumberOfDataCols = _root.RespondentList.columnCount;
               }
               if(_global.NumberOfQuotaCols == undefined)
               {
                    _global.NumberOfQuotaCols = 0;
                    _global.CriteriaNames = new Array();
                    _global.CriteriaMax = new Array(); 
               }
               
               else
               {     
                    var TotalCols = _root.RespondentList.columnCount;
                    var StopDeletingAt = _root.RespondentList.columnCount-_global.NumberOfQuotaCols;          
                    for(var i=TotalCols; i>=StopDeletingAt; i--)
                    {
                         _root.RespondentList.removeColumnAt(i);
                    }
               }
                         
               //We need to find how many columns we actually need to create. Best way to do this is to loop over the criteria boxes, as
               //soon as we find an empty one, stop counting.
          
               _global.NumberOfQuotaCols = 0;
          
          
               for(var i=1; i<=10; i++)
               {
                    if(eval("Criteria"+i+".text.length") != 0)
                    {
                         _global.NumberOfQuotaCols++;
               
                         //Create a new column object and set some properties
                         var ColumnName = 'Criteria_'+i+'_Hidden__c';
                         var ColToAdd:DataGridColumn = new DataGridColumn(ColumnName);
                         ColToAdd.width = 100;
                         ColToAdd.headerText = eval('Criteria'+i+'.text');
                         
                         //Store the quota names in an array
                         
                         _global.CriteriaNames[i-1] = eval('Criteria'+i+'.text'); 
                         _global.CriteriaMax[i-1] = eval('Criteria'+i+'max.text');
                         _root.RespondentList.addColumn(ColToAdd);
                         this["MeetsQuota"+i].visible = true;
                    }
                    else
                    {
                         this["MeetsQuota"+i].visible = false;
                    }
               }
               widenQuotaCols();
               refreshQuotaGrid();                                                            
          }

Of course others would have to customize that heavily to meet their needs.

Can you post a short code sample?