To move and resize a control at runtime, I use the resize event of the main form.
In it I put things like...
thisform.grid1.height = thisform.height - 75
thisform.grid1.Width = thisform.Width - 38
and for controls,
thisform.cmdUpdate.Top = thisform.height - 43
thisform.cmdSearch.Top = thisform.height - 43
thisform.cmdopt.Top = thisform.height - 43
*thisform.cmdLogoff.Top = thisform.height - 43
thisform.cmdClose.Top = thisform.height - 43
You have to do a little playing with the numbers and of coures revisit this if you ever relocate a control.
Of course you can play with the width of the controls, but after a while you will have to address the font size.

HTH