Oh, you're saying EMPTY() works for .F. or 0? Gotcha.

I thought you meant testing for not having either T or F in it. :-)

>>
>>But I've still got to test for 1/0 or T/F, as below:
>>
>>

>>With Thisform
>>  If this.Value <> .F.			&& so no need choose operator
>>      .txtOperator.enabled	    = .F.
>>      .cboOperators.enabled	    = .F.
>>      .lValidOp		    = .T.
>>  Else					&& Allow choose an operator
>>      .txtOperator.enabled	    = .T.
>>      .cboOperators.enabled	    = .T.
>>      If not EMPTY( .nOpCode)
>>          .lValidOp	    = .T.  	&& already got an operator from previous choice or default
>>      Else
>>	 .lValidOp	    = .F.
>>      EndIf
>>  EndIf
>>  .lmEnablePrint()
>>EndWith
>>
>>

>>
>>???????????????????/
>
>>

>>With Thisform
>>  If !empty(this.Value)		&& so no need choose operator <<<<<<<<<<<<<<<<<<<<<
>>      .txtOperator.enabled	    = .F.
>>      .cboOperators.enabled	    = .F.
>>      .lValidOp		    = .T.
>>  Else					&& Allow choose an operator
>>      .txtOperator.enabled	    = .T.
>>      .cboOperators.enabled	    = .T.
>>      If not EMPTY( .nOpCode)
>>          .lValidOp	    = .T.  	&& already got an operator from previous choice or default
>>      Else
>>	 .lValidOp	    = .F.
>>      EndIf
>>  EndIf
>>  .lmEnablePrint()
>>EndWith
>>
>>