>Whilst dynamically altering a VFP5 standard grid at run time, I add a CheckBox control to a logical field. To this point it is fine, but when I attempt to set the 'Sparse' property to .F. within the Forms init method using - ThisForm.grdDispDupes.Columns(lnTableFields).Sparse = .F. - It causes an illegal operation, citing an 'invalid page fault'.

My suggestion for a workaround is to either set the column to be spare in the form editor, or to put this.sparse = .F. in the column init