how to delete a file

how can i delete a file i used the code

Code:

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dir=new QDir(dir->currentPath());
    QFile file3(dir->filePath("Time.xml"));
    file3.remove();

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but it doesnot works and returns false.

Code:

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QFile::remove("Time.xml"); // assuming Time.xml is in current dir

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... and check the return value of QFile::remove() and QFile::error() if you want to know when and why it failed (for example, the file does not exist, is locked, or you have insufficient permission).