title: Add button control in current cell of datagrid view control
body: <p>I want to add a custom control(Button) in current cell of Datagridview 
      control. i have created the custom control(Button). My requirement is  when i 
      clicking any cell of the Datagridview, this control should show on that cell. 
      here is the screen shot of this.</p>
  
  <p><img src="https://i.stack.imgur.com/ixtcu.png" alt="enter image description here"></p>
  
  <p>Please help me to overcome this problem. Any help appreciated.</p>
  
  <p><strong>NOTE:- This button is not a drop down button. It is just a simple button with drop down image. By clicking on this button a popup window will be open.</strong></p>