Item 

Description 

Source Type  

Specifies the language to use for the main module of the application.  

Use VCL  

Creates an application that can contain VCL components. This option is available only if you choose C++ as your Source Type. Checking this option causes the IDE to include vcl.h and to change the startup code and linker options for compatibility with VCL objects.  

Multi Threaded  

Specifies more than one thread of execution. This option is required if you check Use VCL.  

Console Application  

Creates a console window for your application.  

Specify project source  

Allows you to specify an existing source file for the console application. To specify a source file, check this option and click [...] to locate a file.