#include <QApplication>
#include <QMessageBox>
#include <QImage>
#include <QPainter>
#include <QLabel>

QImage getImage(bool wrong)
{
	QImage Image(100, 100, QImage::Format_RGB32);
	Image.fill(QColor(255, 255, 255, 255));
	QPainter painter(&Image);
	QPen pen;
	if (wrong)
		pen.setColor(QColor(0, 0, 0, 254));
	else
		pen.setColor(QColor(0, 0, 0, 255));
	pen.setWidth(1);
	painter.setPen(pen);
	QFont Font("Verdana");
	Font.setPointSize(10);
	painter.setFont(Font);
	QTextOption to;
	to.setAlignment(Qt::AlignLeft | Qt::AlignTop);
	painter.drawText(QRect(50, -5, 500, 20), "abcd", to);
	return Image;
}

void showImage(bool wrong)
{
	QMessageBox mb;
	mb.setWindowTitle(wrong ? "Wrong" : "Correct");
	QLabel *a = new QLabel(&mb);
	a->setPixmap(QPixmap::fromImage(getImage(wrong)));
	a->resize(a->pixmap()->size());
	mb.show();
	mb.exec();
}

int main(int argc, char** argv)
{
	QApplication qapp(argc, argv);
	showImage(false);
	showImage(true);
}