Setting the Application Icon on Windows
First, create an ICO format bitmap file that contains the icon image.
This can be done with e.g. Microsoft Visual C++: Select File|New, then
select the File tab in the dialog that appears, and choose Icon. (Note
that you do not need to load your application into Visual C++; here we
are only using the icon editor.)
Store the ICO file in your application's source code directory, for
example, with the name myappico.ico. Then, create a text file called,
say, myapp.rc in which you put a single line of text:
IDI_ICON1 ICON DISCARDABLE "myappico.ico"
Finally, assuming you are using qmake to generate your makefiles, add this line to your myapp.pro file:
RC_FILE = myapp.rc
Regenerate your makefile and your application. The .exe file will now be represented with your icon in Explorer.
If you do not use qmake, the necessary steps are: first, run the rc
program on the .rc file, then link your application with the resulting
.res file.
首先准备个ICO图标。例如：myappico.ico
用写字版新建个文件
里面就写一行：
IDI_ICON1 ICON DISCARDABLE "myappico.ico" 保存改名为
myapp.rc并把它和你的图标myappico.ico一起复制到你的QT工程项目的目录。用写字版打开你的QT工程文件（如
"myapp.pro" ），在里面最后新添一行
RC_FILE = myapp.rc 保存，编译你的工程
方法试了，是可以的。