>VFP 6.0
>SP 5
>Windows 98
>
>Anyone can help me?
>
>How can I calculate a column in Grid poblated by free fields.
>My coding is like this:
>
>If x=.t.

This can be simplified as:

if x

... since x is already of a logical type.

if x
   LnMyVariable =  1
Else
   LnMyVariable =  2
Endif

Spaces in VFP code are preserved if you use the HTML codes < PRE > (at the beginning), and < /PRE > (at the end). (Without spaces.)

>select DETAILS
>Thisform.GridLiquidac.RecordSource = 'DETAILS’
>Thisform.GridLiquidac.Liquid.ControlSource='DETAILS.Field1'
>Thisform.GridLiquidac.Item.ControlSource ='DETAILS.Field2' Thisform.GridLiquidac.Weight.ControlSource='DETAILS.Field3'
>Thisform.GridLiquidac.Libras.ControlSource='DETAILS.Field3' * LnMyVariable
>Thisform.GridLiquidac.refresh()
>
>* But can´t obtaind the desired results, and receive the error message: Data type Mismatch when I define like this:
>
>'DETAILS.Field3' * LnMyVariable

I think you should put quotations marks around the entire expression:

Thisform.GridLiquidac.Libras.ControlSource="DETAILS.Field3 * LnMyVariable"

or perhaps:

Thisform.GridLiquidac.Libras.ControlSource="=DETAILS.Field3 * LnMyVariable"

Try both, and see which works.

Saludos,

Hilmar.