dQTProjectsJBMNmainwindowcpp27 error qualified-id in declaration before = tokenJBMNmainwindowcpp In constructor MainWindowMainWindowQWidgetJBMNmainwindowcpp2739 error qualified-id in declaration befor

This error message indicates that there is a syntax error in the declaration of a variable in the MainWindow constructor. The error is caused by the qualified identifier (MainWindow::lpPrevWndFunc) being declared before the equal sign (=) token.

To fix this error, ensure that the variable declaration follows the correct syntax by placing the qualified identifier after the equal sign. For example:

WNDPROC MainWindow::lpPrevWndFunc = nullptr;