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• How do I use the ColorDialog to pick a color?

  It is straightforward. Create an instance of the class and call its ShowDialog method. ColorDialog colorDialog1 = new ColorDialog(); if ( colorDialog1.ShowDialog() != DialogResult.Cancel ) textBox1.ForeColor = colorDialog1.Color; Contributed from George...

• How do I use the FontDialog class to set a control's font?

  It is straightforward. Create an instance of the class and call its ShowDialog method. FontDialog fontDialog1 = new FontDialog(); if ( fontDialog1.ShowDialog() != DialogResult.Cancel ) textBox1.Font = fontDialog1.Font ; Contributed from George Shepherd's...

• How do I implement a Folder Browser class?

  Below is a technique that uses FolderNameEditor and FolderBrowser classes to implement a solution. You can also use iterop to get a solution. Both the FolderNameEditor and FolderBrowser classes used in this solution are described in the Docs as "This...

• How do I specify the path for the FolderBrowser instance when it opens the first time?

  In the .NET Framework 1.1 there is a SelectedPath property that will let you do this. Contributed from George Shepherd's Windows Forms FAQ

• How do I use the OpenFileDialog?

  using System.Text; using System.IO; private string ChooseTextFile( string initialDirectory ) { OpenFileDialog dlg = new OpenFileDialog(); dlg.Title = "Open text file"; dlg.InitialDirectory = initialDirectory; dlg.Filter = "txt files (*...

• How do I display a confirmation dialog when the user closes the form?

  You can listen to the Form's Closing event, where you can display a MessageBox as show below: using System.ComponentModel; private void Form1_Closing( object sender, CancelEventArgs e ) { string text = "Do you want to close the application?";...

• How do I ensure that no more than one instance of modeless dialog is created or open at a time?

  One way to do this is to maintain a list of opened modeless dialogs, and check this list before you open a new one to see if one is already present. If you open all these modeless dialog's from the same 'main' form, then you can use the OwnedForms...

• How do I detect if the user clicks into another window from a modal dialog?

  Use the Form.Deactivate event: Deactivate += new EventHandle( OnDeactivate ); // ... private void OnDeactivate( object s, EventArgs e ) { Close(); } Shawn Burke, Microsoft

• How do I display a status dialog in a background thread during a long operation and allow the user to cancel?

  You can do this by starting a new thread and executing Application.Run for the status dialog form when the background thread starts running. To communicate changes in percentage use BeginInvoke to executes a specific delegate asynchronously on the thread...