@ Member 11849346
What you want is "A popup with TextBox and Save button"
You can do it by just following these steps:
1. Create A New Form suppose frmPopUp.cs
2. Place TextBoxe(s), Button(s)
3. Now, Suppose that You want it to Open From the FOrm "frmMain.cs" then Write this Code in "frmMain.cs"
frmPopUp popupForm = new frmPopup();
popupForm.ShowDialog();
This Will Open frmPopup and would not allow you to interact with frmMaint until you close it...
Have a try!!!