.NET - Windows Controls

The RichTextBox control contains the Lines array property, which displays one item of an array in a separate line. Each line entry has a Length property, which can be used to accurately position the cursor at a character, as shown in the following code snippet:

private void GoToLineAndColumn(RichTextBox RTB, int Line, int Column)
{
 int offset = 0;
 for(int i = 0; i < Line -1 && i < RTB.Lines.Length; i++)
 {
 offset += RTB.Lines[i].Length + 1;
 }
 RTB.Focus();
 RTB.Select(offset + Column, 0);
}

The WindowsDefaultLocation property makes the form to start up at a location selected by the operating system, but with internally specified size. The WindowsDefaultBounds property delegates both size and starting position choices to the operating system.

The ImageList control is a component; therefore, it appears in the component tray at the design time.

To avoid dropping of a Combobox, you need to override the WndProc() method and ignore WM_LBUTTONDOWN and WM_LBUTTONDBLCLK events.