>That's ok, I see what you mean, but there is still a diference when there are some toolbars and the sysmenu active, how can I know that to make the coord equal?
>
>better yet, I need the title bar and the border of the form, need a way to make a rational!!!

Ok :)
Download this file http://www.levelextreme.com/wconnect/wc.dll?FournierTransformation~2,2,14876

* Init event
Procedure Init
Public oFM
   oFM = NewObject('FormMetric', 'HTWindow')
   oFM.GetSysMetric(ThisForm)
EndProc

* MouseMove event
Procedure MouseMove
LParameters nButton, nShift, nXCoord, nYCoord
   Local ln_Width, ln_Height

   * Assuming VFP title, VFP sysmenu, VFP toolbar and Form title is active
   * We need 4 times of title height
   If (_Screen.WindowState = 0)
      ln_Width = (oFM.fbWidth * 2) + 1
      ln_Height = (oFM.fbHeight * 3) + (oFM.ftHeight * 4)
   endif
   If (_Screen.WindowState = 2)
      ln_Width = oFM.fbWidth
      ln_Height = (oFM.fbHeight * 2) + (oFM.ftHeight * 4)
   endif
   Thisform.txtFormPos.Value = alltrim(str(nXCoord+ln_Width)) + ;
      [, ] + alltrim(str(nYCoord+ln_Height))
EndProc

That's the idea. You should actually find the real width and height for all objects, so it will work in any configuration.
HTH