I'd like to have a grid color an entire row say black on yellow that follows the recordmark on the grid.

Add a property called nRecNo to your grid class and initialize it to 0 in the propery sheet.

This code in the grid's Init()

This.nRecNo = RECNO( This.RecordSource )
This.SetAll( 'DynamicBackColor', ;
	'IIF( RECNO( This.RecordSource ) = This.nRecNo, RGB( 255, 255, 0 ), RGB( 255, 255, 255 ) )', 'COLUMN' )

This is the grid's AfterRowColChange:

Thisform.LockScreen = .T.
This.nRecNo = RECNO( This.RecordSource )
Thisform.Refresh()
Thisform.LockScreen = .F.