My problem is when I move the mouse in x64 it only moves to right, it ignores up,left and down, it also does it extremely slowly(it only registers a quarter of the mouse delta move) compared to Win32. I expect this is a result of long being 64bit in Win64, and how would I deal with this change?

WM_INPUT in main.cpp

UInt nSize = 40;
BYTE m_Buffer[40];
GetRawInputData( (HRAWINPUT)lparam, RID_INPUT, (LPVOID)m_Buffer, &nSize, sizeof(RAWINPUTHEADER));
//ASSERT( nSize <= BUFFER_SIZE );
RAWINPUT* pRaw = (RAWINPUT*) m_Buffer;

// Read keyboard and mouse data
if( pRaw->header.dwType == RIM_TYPEKEYBOARD ){Kb.GatherRawInput(&pRaw->data.keyboard );}
if( pRaw->header.dwType == RIM_TYPEMOUSE ){Ms.GatherRawInput( &pRaw->data.mouse);}

Inside MsGatherRawInput

delta is a int x,y structure.

delta.set((int)pRM->lLastX,(int)pRM->lLastY);

UInt nSize = 40;
BYTE m_Buffer[40];

The size difference between 32bit and 64bit.

use something like:

uint8 buffer[sizeof(RAWINPUT)] = {};
uint32 size = sizeof(RAWINPUT);

UInt nSize = 40;
BYTE m_Buffer[40];

The size difference between 32bit and 64bit.

use something like:

uint8 buffer[sizeof(RAWINPUT)] = {};
uint32 size = sizeof(RAWINPUT);

Your nick is confusing, but thank you, this worked splendidly.

Thanks for all the fast replies guys.