virtualbox seamless mouse pointer integration and install guest additions

While running the Redhat linux on Virtual box, every time when I want to leave from
guest OS to host system I need to press "Ctrl" key (my Host key is Ctrl) .This is because seamless mouse pointer integration is not enable. This is painful and takes time to jump between guest OS and host system. After reading some forums post and web articles I have come across with a solution.In this method there will be one mouse pointer and pressing the Host key is no longer required to "free" the mouse from being captured by the guest OS and vice-versa. Following steps guide how to enable seamless mouse support on linux based guest system.

[1] install gcc and kernel-devel

install the GNU C compiler and the kernel development packages using

#yum install gcc

followed by

#yum install kernel-devel

[2] Reboot guest system

Reboot your guest system in order to activate the updates.

[3]Install Guest Additions

Click "Devices" --> "Install Guest Additions"

[4] Follow the installation wizard
you will get window similar to below and click "OK" , you may need provide authentication

[5] It will be prompted with terminal window similar to following, Press Return and close that window... that's all , Now seamless mouse integration should be enabled . have a nice day!