C++ - Simulating keystrokes using SendInput method, failure to distinguish rightctrl key

I have very little experience in C++, and I'm completely unfamiliar with the SendInput method. I've setup my laptop (with UK keyboard) via a registry modification, to create a crash dump whenever the right control key is held down and scroll lock is twice pressed. I am trying to achieve this programmatically via a c++ executable, compiled in Visual C++ 2010 Express.

Using this post: how to use sendinput function C++ as my inspiration, I have created the code snippet hereunder. Aside from multiple Cannot find or open the PDB debug outputs, which from reading this post: Error Message : Cannot find or open the PDB file can apparently be ignored, the code compiles and runs. However no BSOD transpires. I have manually "forced" the BSOD, so I know it works.

Bearing in mind I'm a novice, please explain what changes must be made for this to work?

#define WINVER 0x500
#include <windows.h>

int main()
{
INPUT ip;
ip.type = INPUT_KEYBOARD;
ip.ki.wScan = 0;
ip.ki.time = 0;
ip.ki.dwExtraInfo = 0;
{
ip.ki.wVk = VK_RCONTROL;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = 0;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_RCONTROL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));
}
return 0;
}