How To Add a Custom Place to a File Dialog Box. Add a path, a Known Folder GUID, or a File. Dialog. Custom. Place object to the Custom. Places collection of the dialog box. The following code example shows how to add a path Open. File. Dialog. 1. Custom. Places. AddC My. Prompting the user to choose a file using the common FileOpen dialog box. The default open and save dialog boxes on Windows Vista have an area on the left side of the dialog box titled Favorite Links. This area is called custom places. Save Device File As. Open a dialog box where you can specify the name of the file. In the bottom of the dialog box you can select the file format for the file. Original Msn Emoticons. Windows is a difficult programoperating system to learn because there so many ways to do the same thing. Below are a couple of ways to open a file in Windows. The Save Capture File As dialog box allows you to save the current capture to a file. The following sections show some examples of this dialog box. Custom. Place. open. File. Dialog. 1. Custom.