The cable coming out of it will have connector with 15 holes in 3 sets of 5. It should plug into the VGA connector on your computer.
See if you have only VGA port on the ASUS Monitor then you need to plugin the VGA part of HDMI to VGA in Asus Monitor and then plug the other part that is HDMI in your Macbook pro.There might be a problem with you that both Asus monitor and the HDMI to VGA cable have same VGA Plugs,Like both of them are female VGA or both of them are Male VGA hence they cannot be connected together.For that problem you need to have one more cable of the opposite character to that of your HDMI to VGA and your monitor's VGA port to establish a connection between the Monitor and Macbook pro using the cable you already have. Like if you have female VGA on your monitor and on your existing cable then you need to buy male to male VGA and vice versa you have to buy female to female VGA for male ports on monitor and cable you already have. If you feel that there is some other problem than that then you can message me directly and i will guide you accordingly.
VGA is an older, analog monitor standard. It stands for video graphics array and it has a 15-pin connector
A VGA box which is used in the gaming industry connects different audio visual pieces of equipment to a monitor which is VGA enabled. This allows games to be played on the monitor.
The VGA is a port in the computer that allows you to view your computer through a monitor.
monitor
A monitor or a video projector.
You just need a GameCube to VGA adapter.
You can buy a DVI to VGA adapter.
AnswerCheck www.Newegg.com for a DVI to VGA dual adapter. They do make single pole adapters all the way up to 24 monitor adapters. That website would be your best bet.-----------------------------------------This website would help you http://www.yourtechworld.com/a-quick-overview-on-vga-and-vga-dual-monitor
Use monitor/VGA splitter.
Yes
Monitor and projector