Want to put some validation in my grid:

1) Want my column to be either S or F. Don't want to use a combo box cause this means click on the dropdown porton of it.

So I put some code in the valid event of my text box in the column, to check if this.value$"FS ", if its not I want a suitable message to appear, seems to get stuck when the validation fails?

Can't remember how to cause a message to be returned

Thanks in advance