qt background color

To set the background color in a Qt application using C++, you can follow these steps:

Step 1: Include the necessary header files:

#include <QApplication>
#include <QWidget>

Step 2: Create a QWidget object:

QWidget *widget = new QWidget();

Step 3: Set the background color:

widget->setStyleSheet("background-color: red;");

Note: Replace "red" with the desired color name or a valid color code.

Step 4: Set the widget as the main window:

widget->show();

Step 5: Run the application event loop:

return QApplication::exec();

These steps will set the background color of your Qt application using C++. Let me know if you have any further questions.