project_lizma

• MFC&API - I used these technology but they are very hard in use. But it play on any version of windows.
• QT library - It's simple to use, has LGPO license. But I've not managed to compile it on my computer :) It may be multiplatform application.
• Microsoft Framework 2.0 - I have not wide experience in it, but it's very simple on the first sign. I have to foget about early versions of windows and it is not so many features as in Windows Presentation Foundation.
•  Windows Presentation Foundation - requires Framework 3.0. It does not contain any calendar control implementation! I do not want to create it. So... It is not best choice.

I wanted to create new item in listview after doubleclick on the blank area. Unfortunately this event is not caught by standard events in .Net by default :(

There is work around: the easiest thing to do would be to create a custom class that inherits from ListView, then override WndProc to look for double clicks, and when they occur call the OnMouseDoubleClick method, which will fire the MouseDoubleClick event for the ListView in your form's code.

Add a new class to your project and call it ListViewEx. Then paste in this code: 

    class ListViewEx : System.Windows.Forms.ListView
    {
        private const int WM_LBUTTONDBLCLK = 0x203; //LEFT MOUSE BUTTON
        private const int WM_RBUTTONDBLCLK = 0x206; //RIGHT MOUSE BUTTON

        override protected void WndProc(ref Message m)
        {
            if ((m.Msg == WM_LBUTTONDBLCLK) || (m.Msg == WM_RBUTTONDBLCLK))
                base.OnMouseDoubleClick(MouseEventArgs.Empty as MouseEventArgs);
            else
                base.WndProc(ref m);
        }
    }

In your forms code, if you need to tell the difference of if they double clicked the blank area or if they double clicked on an item, you just test for selected items. Like this:

        private void MyListView_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (MyListView.selectedItems.Count == 0)
            {
                // Double Click Occured in Blank Area
            }
            else
            {
                // Double Click Occured on Item
            }
        }