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https://www.tsingfun.com/it/cpp/2102.html 

error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘c...

error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘class Derived*’ (source type is not polymorphic)在将父类型转换为子类型时,可以使用static_cast和dynamic_cast.如果使用dynamic_cast,它要求父类必须为多态的,即要求至少有一个虚函数,因此....
https://www.tsingfun.com/it/cpp/2145.html 

MFC的DDX和DDV技巧 - C/C++ - 清泛网 - 专注C/C++及内核技术

...件关系的成员变量的声明,代码: // Dialog Data  //{{AFX_DATA(CMyDlg)  enum { IDD = IDD_DIALOG5 };  int m_edit;  //}}AFX_DATA 2. 在 .CPP文件中的类构造函数告终代码处,增加数据成员变量的一些初始化代码 CMyDlg::CMyDlg(CWnd* pParent ) ...
https://www.tsingfun.com/it/tech/1665.html 

C# 通过代码安装、卸载、启动、停止服务 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...e) { try { IDictionary _SavedState = new Hashtable(); ServiceController service = new ServiceController(serviceName); string dispName = string.Empty; if (!ServiceIsExisted(serviceName, ref dispName...
https://www.tsingfun.com/it/tech/1780.html 

NSIS做的安装程序,可接受命令行参数,实现静默安装,静默卸载 - 更多技术 ...

...nly absolute paths are supported. 3.2.2 Uninstaller Specific Options _?= sets $INSTDIR. It also stops the uninstaller from copying itself to the temporary directory and running from there. It can be used along with ExecWait to wait for the uninstaller to finish. It must be the last parameter u...
https://bbs.tsingfun.com/thread-818-1-1.html 

NSIS做的安装程序,可接受命令行参数,实现静默安装,静默卸载 - 脚本技术 ...

...ces. Only absolute paths are supported. 3.2.2 Uninstaller Specific Options_?= sets $INSTDIR. It also stops the uninstaller from copying itself to the temporary directory and running from there. It can be used along with ExecWait to wait for the uninstaller to finish. It must be the last parameter u...
https://bbs.tsingfun.com/thread-830-1-1.html 

c++ 代码提升权限,请求管理员身份运行权限 - 脚本技术 - 清泛IT社区,为创...

...(SHELLEXECUTEINFO) };         sei.fMask = SEE_MASK_NOCLOSEPROCESS;         // Ask for privileges elevation.         sei.lpVerb = TEXT("runas");         // Create a Comma...
https://bbs.tsingfun.com/thread-1556-1-1.html 

App Inventor 2 怎么选择并打开一个文本文件? - App Inventor 2 中文网 - ...

...ence/components/media.html#FilePicker [/hide] upupupupupupup{:8_389:}{:8_381:}{:8_381:}项目里面有个UrsAl2ByteArrayTest的,是把数据存入手机再导出来。这个就是保存参数和导入参数的功能谢谢,这给了我很大的帮助!
https://bbs.tsingfun.com/thread-2291-1-1.html 

HAXM 安装/启动失败? - App Inventor 2 离线版 - 清泛IT社区,为创新赋能!

报错如下: emulator: Android emulator version 30.3.5.0 (build_id 7033400) (CL:N/A) 127.0.0.1 - - [01/Apr/2025 16:55:37] "GET /echeck/ HTTP/1.1" 200 39 handleCpuAcceleration: feature check for hvf emulator: ERROR: x86_64 emulation currently requires hardware acceleration! CPU accel...
https://bbs.tsingfun.com/thread-2301-1-1.html 

垂直布局,高度无法充满怎么解决 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

C:\Users\Lenovo\Desktop\wechat_2025-04-06_205731_542.png你好,请把 Screen1 下面的组件树展开看看。 目测是因为这个 垂直布局 的父组件,高度没有充满整个屏幕,所以它只能充满它的父组件的高度。没有设置的选项App Inventor 2  发表...
https://bbs.tsingfun.com/thread-2349-1-1.html 

拍照时报错求助! - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...刚把主屏幕初始化的所有程序都清空了,这回不报错了{:8_314:}Abi 发表于 2025-04-30 12:30 刚刚把主屏幕初始化的所有程序都清空了,这回不报错了 那可能是初始化中某个代码块导致的报错问题了{:8_368:}App Inventor 2  发表于 202...