"Visual FoxPro程序设计入门：VFP命令文件建立与执行"

The Visual FoxPro (VFP) program command file is essential for the development and execution of programs in VFP. In chapter 5 of the Visual FoxPro program design introduction, various aspects of the program command file are covered, including the establishment and execution of VFP program command files, commonly used programming commands and functions, flowchart introduction, sequential execution, conditional branching, looping structures, procedures, and user-defined functions. For the establishment and execution of a VFP program command file, the MODIFY COMMAND command can be used to open the command file edit window, with the command format as follows: MODIFY COMMAND [<filename>]. This command allows for the creation and editing of a specified command file, with the default file extension being .PRG. When a file is specified, a backup file with the same name and content is first copied onto the disk. Editing can be concluded with the ^End or ^W command to save the file, or the Esc key to cancel the editing and conclude the command. Alternatively, the command file can also be created using menu operations, where the user can navigate to File → New → select the "Program" radio button → click "New File" to open an edit window for program input. The project manager can also be utilized to establish a command file, with detailed instructions available in chapter thirteen. The VFP program also covers commonly used programming commands and functions, flowchart introductions, sequential execution, conditional branching, looping structures, procedures, and user-defined functions. These components are important for the understanding and execution of programs in VFP, allowing for efficient and structured programming. The VFP program command file and its associated components contribute to the development and execution of programs in VFP, ensuring a systematic and organized approach to program design.