SELECT idsubunit,iduser, pay_date, cash_symbol, cash_acc, transit_account, 
      COUNT(transit_account) pay_count, SUM(pay_sum) total_pay_sum, CAST('0' AS Integer) is_checked 
   FROM bst_payments 
   WHERE pay_date BETWEEN DATE('01.08.2010') AND DATE('26.08.2010') 
   GROUP BY cash_symbol, transit_account, pay_date, idsubunit, iduser, cash_acc 
   ORDER BY idsubunit, cash_symbol

..., ,f, as is_checked ...

..., .f. as is_checked ...

SELECT * FROM cashord_tmp INTO TABLE cashord
USE IN cashord_tmp
ALTER TABLE cashord ADD COLUMN is_checked L

replace cashord.is_checked WITH this.Value
this.Refresh

	SELECT * FROM cashord INTO CURSOR cashord READWRITE

...
lnSQLResult = SQLEXEC(gnConnHandle, lcMySQL, "cashord")
	
this.cursorcreated = (lnSQLResult != - 1 )

IF !this.cursorcreated
	= MESSAGEBOX("Курсор не создан.",  16 , "Ошибка")
ELSE

	IF USED("cashord")
		USE IN cashord
	ENDIF
	SELECT * FROM cashord INTO CURSOR cashord READWRITE    && выдает указанную ошибку
	ALTER TABLE cashord ADD COLUMN is_checked L
ENDIF
...

ALTER TABLE cashord ADD COLUMN is_checked L

Expression is invalid. Use a valid
expression for
DYNAMICCURRENTCONTROL
property.

thisform.Grid1.Column1.DynamicCurrentControl = "Checkbox1"

return "CheckBox1"

thisform.Grid1.Column1.DynamicCurrentControl = "ThisForm.SelectedControl()"

thisform.Grid1.Column1.DynamicCurrentControl = "=ThisForm.SelectedControl()"

thisform.checkstate = this.Value && checkstate - заданное мною св-во формы

LOCAL lcCheckBoxName as String

* CheckOn, CheckOff - имена Checkbox-ов

lcCheckBoxName = IIF(thisform.checkstate, "CheckOn", "CheckOff")

RETURN lcCheckBoxName

thisform.Grid1.Column1.DynamicCurrentControl = "=ThisForm.SelectedControl()"