Win32 SendInput mousemove lag and freeze - c++

Question

I am trying to move the mouse (on Windows 10) using SendInput when I perform a physical mouse click. It works fine if I click once or twice, but if clicking for examples 6 times in quick succession the mouse lags for a few seconds then the program stops responding.
Is there any obvious reason why this is happening?
(Edited)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
LRESULT CALLBACK MouseHook(int, WPARAM, LPARAM);
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR, int)
{
HHOOK hook = SetWindowsHookEx(WH_MOUSE_LL, MouseHook, NULL, 0);
MessageBox(NULL, L"Hello", L"Hello", MB_OK);
UnhookWindowsHookEx(hook);
return 0;
}
LRESULT CALLBACK MouseHook(int nCode, WPARAM wParam, LPARAM lParam) {
if (nCode == HC_ACTION) {
switch (wParam) {
case WM_RBUTTONUP:
INPUT buffer;
ZeroMemory(&buffer, sizeof(buffer));
buffer.type = INPUT_MOUSE;
buffer.mi.dx = 0;
buffer.mi.dy = 10;
buffer.mi.mouseData = 0;
buffer.mi.dwFlags = MOUSEEVENTF_MOVE;
buffer.mi.time = 0;
buffer.mi.dwExtraInfo = 0;
SendInput(1, &buffer, sizeof(INPUT));
}
}
return CallNextHookEx(NULL, nCode, wParam, lParam);
}

Answer 1

Using Raw Input sample:
#include <windows.h>
#include <iostream>
using namespace std;
BOOL registerTouchpadForInput(HWND hWnd)
{
RAWINPUTDEVICE rid;
rid.dwFlags = RIDEV_NOLEGACY | RIDEV_INPUTSINK;
rid.usUsagePage = 1;
rid.usUsage = 2;
rid.hwndTarget = hWnd;
return RegisterRawInputDevices(&rid, 1, sizeof(rid));
}
void getinputdata(LPARAM lparam)
{
HRAWINPUT hInput = (HRAWINPUT)lparam;
RAWINPUT input = { 0 };
UINT size = sizeof(RAWINPUT);
GetRawInputData(hInput, RID_INPUT,&input, &size,sizeof(RAWINPUTHEADER));
if (RIM_TYPEMOUSE == input.header.dwType)
{
if (input.data.mouse.usButtonFlags & RI_MOUSE_RIGHT_BUTTON_DOWN)
{
INPUT buffer;
ZeroMemory(&buffer, sizeof(buffer));
buffer.type = INPUT_MOUSE;
buffer.mi.dx = 0;
buffer.mi.dy = 10;
buffer.mi.mouseData = 0;
buffer.mi.dwFlags = MOUSEEVENTF_MOVE;
buffer.mi.time = 0;
buffer.mi.dwExtraInfo = 0;
SendInput(1, &buffer, sizeof(INPUT));
}
}
return;
}
static LRESULT CALLBACK NVTouch_WindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
BOOL registrationStatus = false;
switch (message)
{
case WM_CREATE:
registrationStatus = registerTouchpadForInput(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_INPUT:
getinputdata(lParam);
return DefWindowProc(hwnd, message, wParam, lParam);
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
int main()
{
WNDCLASSEX wndclass = {
sizeof(WNDCLASSEX),
CS_DBLCLKS,
NVTouch_WindowProc,
0,
0,
GetModuleHandle(0),
LoadIcon(0,IDI_APPLICATION),
LoadCursor(0,IDC_ARROW),
HBRUSH(COLOR_WINDOW + 1),
0,
L"myclass",
LoadIcon(0,IDI_APPLICATION)
};
bool isClassRegistered = false;
isClassRegistered = RegisterClassEx(&wndclass);
if (isClassRegistered)
{
HWND window = CreateWindow(wndclass.lpszClassName, NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, GetModuleHandle(0), NULL);
if (window)
{
ShowWindow(window, SW_SHOWDEFAULT);
MSG msg;
while (GetMessage(&msg, 0, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
}