diff --git a/img/dtkdemo.png b/img/dtkdemo.png
index 4ba3c14c6cde73a806fcf4c926370e0163af9b41..e455e73264f8c048c5a0dbfcdf5207d90c6327a5 100644
Binary files a/img/dtkdemo.png and b/img/dtkdemo.png differ
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 36fd0efc973ab98583b32a3c76a42e5d8c101464..3cf3e2e9d26c9466a58f4c00cca2836afd49e76f 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -17,7 +17,7 @@ MainWindow::MainWindow(DMainWindow *parent)
     //下面是创建控件的实例 The following is an example of creating a control
     DLabel *label=new DLabel;
     label->setParent(w);
-    label->setText("Hellow World");
+    label->setText("Hello World");
     label->show();
 
     //在标题栏添加控件（其实可以把标题栏看成一个Widget,详细的说明请看文档) Add a control to the title bar (In fact, the title bar can be regarded as a Widget. Please refer to the document for detailed instructions.)