Hi Albert

Well on a Forum how is one to know the level of knowledge of another? The point I was making about what I do is that I use the IDE and test the combo OUTSIDE the grid before dropping it into the Grid. This makes it easier to maniuplate the properties and see the result.
>(even i don't know, how to copy and paste into a grid?)

There is another thing you can try. Create a class of type container and insert the two combo's into that. In the init of the container set your code to hide one and displey the other etc. Change width etc.

Drop it on your FORM and in the grid AfterRowColChange just put ThisForm.Refresh. Run the form to see if your Container/Combo's work as they should. If you need different combos in each Row of the grid, see how changing the CurrentControl from one of the Dynamic Properties of the Column works.

If all is well then only drop it into the Grid.

Lets know how you are doing

Bernard