In my code I call MyTable.HideCol(0) but this only hides the column on the header and first row
Is that correct?
I retested this here and could not see an issue. The column is hidden on all rows of the control.
If the problem persists with the latest version, please isolate this and provide a sample source project with which we can reproduce this.
I've coded around it and if I have the time I'll try to give you a simple version (my list of simple versions is getting longer, but once I have coded around it, the pressures off). This is the latest non beta version.