Popup window in winform c#

Question

I'm working on a project where I need a popup window. But the thing is I also want to be able to add textboxes etc in this popup window thru the form designer.

So basically I have a button and when you click on it it will open another window that I've designed in the form designer.

I've been doing some googling but I haven't found what I needed yet so I was hoping you guys could help me!

Answer 1

Just create another form (let's call it formPopup) using Visual Studio. In a button handler write the following code:

var formPopup = new Form(); formPopup.Show(this); // if you need non-modal window 

If you need a non-modal window use: formPopup.Show();. If you need a dialog (so your code will hang on this invocation until you close the opened form) use: formPopup.ShowDialog()

Answer 2

This is not so easy because basically popups are not supported in windows forms. Although windows forms is based on win32 and in win32 popup are supported. If you accept a few tricks, following code will set you going with a popup. You decide if you want to put it to good use :

class PopupWindow : Control {     private const int WM_ACTIVATE = 0x0006;     private const int WM_MOUSEACTIVATE = 0x0021;      private Control ownerControl;      public PopupWindow(Control ownerControl)         :base()     {         this.ownerControl = ownerControl;         base.SetTopLevel(true);     }      public Control OwnerControl     {         get         {             return (this.ownerControl as Control);         }         set         {             this.ownerControl = value;         }     }      protected override CreateParams CreateParams     {         get         {             CreateParams createParams = base.CreateParams;              createParams.Style = WindowStyles.WS_POPUP |                                  WindowStyles.WS_VISIBLE |                                  WindowStyles.WS_CLIPSIBLINGS |                                  WindowStyles.WS_CLIPCHILDREN |                                  WindowStyles.WS_MAXIMIZEBOX |                                  WindowStyles.WS_BORDER;             createParams.ExStyle = WindowsExtendedStyles.WS_EX_LEFT |                                    WindowsExtendedStyles.WS_EX_LTRREADING |                                    WindowsExtendedStyles.WS_EX_RIGHTSCROLLBAR |                                     WindowsExtendedStyles.WS_EX_TOPMOST;              createParams.Parent = (this.ownerControl != null) ? this.ownerControl.Handle : IntPtr.Zero;             return createParams;         }     }      [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]     public static extern IntPtr SetActiveWindow(HandleRef hWnd);      protected override void WndProc(ref Message m)     {         switch (m.Msg)         {             case WM_ACTIVATE:                 {                     if ((int)m.WParam == 1)                     {                         //window is being activated                         if (ownerControl != null)                         {                             SetActiveWindow(new HandleRef(this, ownerControl.FindForm().Handle));                         }                     }                     break;                 }             case WM_MOUSEACTIVATE:                 {                     m.Result = new IntPtr(MouseActivate.MA_NOACTIVATE);                     return;                     //break;                 }         }         base.WndProc(ref m);     }      protected override void OnPaint(PaintEventArgs e)     {         base.OnPaint(e);         e.Graphics.FillRectangle(SystemBrushes.Info, 0, 0, Width, Height);         e.Graphics.DrawString((ownerControl as VerticalDateScrollBar).FirstVisibleDate.ToLongDateString(), this.Font, SystemBrushes.InfoText, 2, 2);     } } 

Experiment with it a bit, you have to play around with its position and its size. Use it wrong and nothing shows.