In general, you can put validation code in a TextBox Valid() Event. If a condition is not fulfilled, return .F. to avoid losing the focus.

In the case of a grid, you might also try the BeforeRowColChange() Event. In this case, if the condition is not fulfilled, use the command NODEFAULT to avoid losing the focus.

>hi all,
>i need help to stop arrow up or arrow down at mygrid if the result via my code is false
>

>   m.a=thisform.timeadd(thisform.timeadd(thisform.timeadd(thisform.timeadd(true,hot),balanc),mint),other)
>   m.w=thisform.timeadd(plan,("00:00:00"))
>IF m.a=m.w and m.a>"00:00:00" and m.w>"00:00:00"
>          *=MessageBox("true")
>          grdTable = thisform.Grid1.RecordSource
>          thisform.Grid1.column7.SetFocus()
>          SKIP IN (grdTable)
>    IF EOF()
>       SKIP -1 IN (grdTable)
>    ENDIF
>
>ELSE
>      =MessageBox("false")
>      thisform.Grid1.column7.SetFocus()
>ENDIF
>
>

>thanks