When you use a Column with a textbox and Sparse = .F.,
VFP build the column with Alignment = Top Left.

PUBLIC oform1

oform1=NEWOBJECT("form1")
oform1.Show

DEFINE CLASS form1 AS form

	ADD OBJECT command1 AS commandbutton WITH ;
		Top = 11, ;
		Left = 42, ;
		Height = 27, ;
		Width = 84, ;
		Caption = "CLICK HERE", ;
		Name = "Command1"

	ADD OBJECT grid1 AS grid WITH ;
		ColumnCount = 1, ;
		Height = 200, ;
		Left = 27, ;
		Panel = 1, ;
		RowHeight = 49, ;
		Top = 47, ;
		Width = 320, ;
		Name = "Grid1", ;
		Column1.Sparse = .F., ;		&& <====== TextBox
		Column1.Name = "Column1"
		
		PROCEDURE grid1.Column1.Init
			this.text1.BackColor = RGB(255,0,0)
		ENDPROC

	PROCEDURE Load
		CREATE CURSOR myCursor ( f1 C(10) DEFAULT STR(RECNO()))
		FOR i=1 TO 10
		  APPEND BLANK
		NEXT
		LOCATE
	ENDPROC


	PROCEDURE command1.Click
		KEYBOARD '{TAB}'
	ENDPROC

ENDDEFINE

A possible workaround is to rewrite column alignment,
but this clone column alignment into the textBoxes,
and if i have more column controls with different Alignment i destroy the column schema.

Another way is to force textBox alignment to the correct value into the VCX grid definition.

Much annoying one.