QTextBrowser: Cannot open

[veda]

I want to open a html file in the text browser ,
and the code is as follows:

#include <QtGui>
#include <QUrl>
#include <QTextBrowser>
int main(int argc, char **argv)
{
	QApplication app( argc, argv );
	QTextBrowser *bw = new QTextBrowser;
	bw->setSource (QUrl("D:\\Wikipedia.html"));
	bw->setGeometry ( 100,100,400,400 );
	bw->show();
	return app.exec();
}

#include <QtGui>
#include <QUrl>
#include <QTextBrowser>
int main(int argc, char **argv)
{
	QApplication app( argc, argv );
	QTextBrowser *bw = new QTextBrowser;
	bw->setSource (QUrl("D:\\Wikipedia.html"));
	bw->setGeometry ( 100,100,400,400 );
	bw->show();
	return app.exec();
}

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QFSFileEngine:pen: No file name specified
QTextBrowser: Cannot open 'D:\Wikipedia.html' for reading
QTextBrowser: No document for D:\Wikipedia.html

But the browser is unable to open the file ...

What changes has to be made to identify the file and open it????