with thisform lnRow = 0 .grid1.SETALL("DynamicBackColor", ; "IIF(RECNO('mytest')=lnRow , RGB(0,0,128) , RGB (255,255,255))", "Column") .grid1.SETALL("DynamicForeColor", ; "IIF(RECNO('mytest')=lnRow , RGB(255,255,255) , RGB (0,0,0))", "Column") endwithIt cause error only after the program run for 7-8 hours.