调整窗体大小，始终保持控件在窗体中居中显示:

Private Sub Form_Resize()
Me.btnPrevious.Left = (Me.InsideWidth - Me.btnPrevious.Width - Me.txtNum.Width - Me.btnNext.Width) / 2
    Me.txtNum.Left = Me.btnPrevious.Left + Me.btnPrevious.Width
    Me.btnNext.Left = Me.txtNum.Left + Me.txtNum.Width
    Me.btnAdd.Left = (Me.InsideWidth - Me.btnAdd.Width - Me.btnReplace.Width - Me.btnDelete.Width) / 2
    Me.btnReplace.Left = Me.btnAdd.Left + Me.btnAdd.Width
    Me.btnDelete.Left = Me.btnReplace.Left + Me.btnReplace.Width
End Sub

调整窗体大小，始终保持控件在窗体中底部显示:

    Dim lngHeight As Long
    lngHeight = Me.InsideHeight
    lngHeight = lngHeight - Me.Section(acHeader).Height - Me.Section(acFooter).Height

 '----------以下为添加的代码--------------------------------------------------------------------
    '窗体大小变化时，通过调整上边距，让“btn删除商品分类”按钮的始终位于窗体下边
    Me.btn删除商品分类.Top = lngHeight - Me.btn删除商品分类.Height
    '再从下到上，根据“btn删除商品分类”的上下位置，调整“btn修改商品分类”按钮的上边距
    Me.btn修改商品分类.Top = Me.btn删除商品分类.Top - Me.btn修改商品分类.Height - 15
    '再从下到上，根据“btn修改商品分类”的上下位置，调整“btn添加商品分类”按钮的上边距
    Me.btn添加商品分类.Top = Me.btn修改商品分类.Top - Me.btn添加商品分类.Height - 15

图   示: