主题：请教如何在第三方窗口中添加狐表的控件？

 这段代码我单独测试没有任何问题

Dim txt As WinForm.TextBox
txt = Forms("窗口1").CreateControl("TextBox1", ControlTypeEnum.TextBox)
txt.Left = 100
txt.Top = 100
txt.Dock = System.Windows.Forms.DockStyle.Top
txt.BindingField = "表A.第一列"                '错误信息: 未将对象引用指向对象实例

Dim 面板 As C1.Win.C1Command.C1DockingTabPage = Tables("表A").grid.parent

面板.controls.add(txt.Basecontrol)