It depends on how the control system is connected to the PC.
1. are you using an off-the-shelf system which plugs into a PC using a standard communications system such as USB, CAN or Ethercat, e.g.
http://www.softservo.com/WMX.php?catID=3&subID=3
if so the hardware will probably come with a library of functions enabling you to control the attached devices from Visual Studio using C++, C#, VB.Net, etc. If you have already used Visual Stidio C++ it will be a case of learning the classes and methods etc to control the devices.
2. are you building you own control system which you will attach to a PC, e.g. using a controller such as TI's DRV8823
http://www.ti.com/product/drv8823
if so you will build a PCB with the controler etc and some communication to the PC which may be USB, CAN, WiFi, etc. In such a case you would also need to learn how to communicate with the appropriate driver using Visual C++
I assume you already know how to use the Visual Studio toolbox, e.g. TextBox, Buttons, MenuItem, TabControl, etc etc. You can build interfaces to control the various remote devices, e.g.
shows the interface to control a Bytronic mechatronics trainer (connected via USB to a PC)
**broken link removed**