Download doxygen from the following URL—http://www.stack.nl/~dimitri/doxygen/download.html. Also download doxygen-x.x.x-setup.exe file. Double-click on that file to install it.

We need to connect DoxyBlocks plugin with doxygen tool. Go to DoxyBlocks | Open preferences… menu option. The following screenshot will be displayed:

Click on the General tab. Next click on the Browse button next to Path To doxygen option and set the path to C:\Program Files\doxygen\bin\doxygen.exe.

Next create a new C++ console project and add the following code to wizard generated main.cpp file:

class A {
    public:
        A() {};
        ~A() {};
        virtual int CallMe(int a) = 0;
};

class B : public A {
    public:
        B() {};
        ~B() {};
        int CallMe(int a) {
            return a;
        }
};

int main() {
    return 0;
}

Navigate to DoxyBlocks | Extract documentation menu option or press Ctrl + Alt+ E key combination. Code::Blocks will now generate documentation of the project inside doxygen folder.

Go to DoxyBlocks | Run HTML menu option or press the Ctrl + Alt + H key combination to open the newly created documentation in a Web browser.

We can also add additional detailed description of function, class, etc to create a detailed documentation.

Move the cursor to the beginning of B::CallMe() function and click on the DoxyBlocks | /** Block comment menu option or press Ctrl + Alt + B key combination. Code::Blocks will analyze the function parameters and will insert a default comment block suitable for doxygen tool. Adjust the comment block and our code will look similar to the following snippet:

        ~B() {};
        /** \brief Virtual function CallMe() is defined here
         *
         * \param a int
         * \return int
         *
         */
        int CallMe(int a) {

Press Ctrl + Alt + E key combination to regenerate the documentation and use the Ctrl + Alt + H key combination to open it inside Web browser. Documentation of B::CallMe() will look similar to the following screenshot: