Sadly there is very little documentation on the interop toolkit the way I am using it. Ironically the answer was in the order of doing things. If I execute the setparent function before I open the vb .net form it works perfectly. Lots of time lost for a stupid problem. Such a Larry

larry118 wrote: Now when I change recors in the master grid I would like the detail in the loaded control to be synchronized. Based on what you've said about your detail grid, I would think all you had to do was update the filter with the new parameters. A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007, 2008