Yes, that would be a question. In the hurry I wrote incorrectly.
Excuse me - my mistake
why + 25?

>Hi,
>Grid is located in the container. Grid has n fields.
>how to calculate the width of a grid ?
>
>This is short example,but...
>
>ukkolw=0
>
>FOR lnCnt = 1 TO loObject.ColumnCount
>
> loCol = loObject.Columns[lnCnt]
> loCol.RemoveObject( loCol.Controls[2].Name )
> loCol.AddObject( "TXTGRIDSEARCH1", "TXTGRIDSEARCH" )
> loCol.ReadOnly = .T.
>
> ukkolw = ukkolw + loCol.Width
>
>ENDFOR
>
>Thanks

Looks like you are not asking grid's width which is simply oGrid.Width, but asking what would be the total width of columns? If so:

Local ix, tWidth, nParentWidth
tWidth = 0
With oGrid
	For ix=1 To .ColumnCount
		With .Columns(m.ix)
			tWidth = m.tWidth + .Width
		Endwith
	Endfor


	nParentWidth = Iif(.Parent.BaseClass == "Page", .Parent.Parent.Width, .Parent.Width)
	If m.tWidth + 25 +.Left > m.nParentWidth - (.Left+1)
		.Width = m.nParentWidth - (.Left+1)
	Else
		.Width = m.tWidth + 25
		.ScrollBars = 2
	Endif
Endwith

PS: This code is extracted and modified from LocatorGrid class' Init method, which is in Grids.vcx of FoxyClasses. You can download and use FoxyClasses from below link if you want to (it comes with all the source code that you can read or modify) - and LocatorGrid might simply be what you are trying to do, check its samples and help.

https://drive.google.com/open?id=1s5kfyL-LP8X2EJqwI7K-TPLzR69yzbjP