The VCL Forms MDI application wizard automatically creates a project that includes the basic files for an MDI application. In addition to the Main source file, the wizard creates unit files for child and about box windows, along with the supporting forms files and resources.

1. Choose FileNewOtherDelphi Projects and double-click the MDI Application icon. The Browse to Folder dialog box is displayed.
2. Navigate to the folder in which you want to store the files for the project.
3. Click OK.
4. Choose RunRun to compile and run the application.
5. Try commands that are automatically set up by the MDI Application wizard.