How do I open another control User?

query resolved?
for your second problem refer this link
http://www.google.co.in/url?sa=t&source=web&cd=9&ved=0CGAQFjAI&url=http%3A%2F%2Fwordbeater.com%2Fgridview-checkbox.html&rct=j&q=how%20to%20get%20checkboxes%20in%20header%20of%20gridview%20of%20c%23.net%203.5&ei=_aiZTca_GcLTrQfTtPn7Cw&usg=AFQjCNHk-InTGaDjHEuc4MD9B8xL_GQxxA&cad=rja

find attached file
i have created a small application to fulfil your needs
i have added reference of windowsformscontrollibrary1 to windowsformapplication1
do it first

but
1. I havn't (TextBox)row otion
2. I havn't GridViewRow option only GridViewRowPresenter 

3. yes, I mean to user controls

is it user controls

1)string textBoxText =((TextBox)row.FindControl("TextBox1")).Text;this is to find specific cell

2)
GridViewRow objRow = (GridViewRow)((TextBox)Sender).Parent; //this should get you the GridViewRow


for your first problem please tell your problem in simple words, the mentioned is not understood and what do you mean by "control user"

 1)string textBoxText = _           ((TextBox)row.FindControl("TextBox1")).Text;

this is to find specific cell

2)
GridViewRow objRow = (GridViewRow)((TextBox)Sender).Parent; //this should get you the GridViewRow

my UserControl heir from another UserControl that heir from UserContorl that in a window (I havn't panel).
like this:
ucgril : ucMan: UserControl - Window.

so I havn't use directly at UserControl (I havn't close, hide function).
 


more Question:
How am I get specific cell from dataGrid (when I look for property of dataGrid I havn't access to Rows).

you have to add user controls on panel or any other container
and do like this
suppose there is one control named ctrl1 and you need to call ctrrl2
then
ctrl2 obj=new ctrl2
ctrl1.hide(); or ctrl1.close();//hide or closes previous control
panel1.controls.add(obj);//adds control to your panel control


if it worked then mark as accepted answer