VC++用于计算器应用程序的开发。

简介：
This application’s class behavior is defined in MyCalculator.cpp. The header file, MyCalculator.h, includes necessary files such as stdafx.h and MyCalculatorDlg.h. Debug builds utilize DEBUG_NEW for memory management. The CMyCalculatorApp class initiates the application’s message map, handling the help command with the standard OnHelp function. The CMyCalculatorApp constructor performs essential initialization tasks, including allocating a singleton instance of the application. The InitInstance function establishes the application’s core components, beginning with a check for compatibility with Windows XP and potentially requiring InitCommonControlsEx() for modern visual controls. It then initializes common controls using a predefined set of classes, setting the registry key for application settings and creating the main dialog window, m_pMainWnd. The dialog box is displayed modally, allowing for user interaction through OK or Cancel buttons; subsequent actions are dependent on user selection and trigger appropriate code execution based on the returned response ID.