>This works for me:
>

>PUBLIC m1 AS Toolbar
>m1 = CREATEOBJECT([ToolBar])
>m1.AddObject([cEdit],[EditBox])
>m1.cEdit.Width = 500
>m1.cEdit.Height = 500
>m1.cEdit.Visible = .t.
>m1.Show()
>WAIT WINDOW [Press a key...]
>m1.cEdit.Width = 800
>WAIT WINDOW [Press a key...]
>m1.cEdit.Height = 200
>WAIT WINDOW [Press a key...]
>RELEASE m1
>

This needs to be done when the toolbar is resized by the user which doesn't take place.
I put the following code in Resize event of the toolbar:

this.edtMessage.Width = this.Width 
this.edtMessage.Height = this.Height 

The resize event never fires.

I could add a button or two to resize the editbox to the toolbar which is not consistent from the rest of the forms in the application. The uses would ask: "Now why did you make this so different from the others?"