1 | initial version |
To capture mouse HID packets in Windows using C++, you can use the Microsoft Raw Input API. This allows you to register your application to receive input messages for devices such as keyboards, mice, and other HID devices.
To capture mouse HID packets specifically, you can follow these steps:
Register your application for raw input using the RegisterRawInputDevices
function. This specifies which devices your application wants to receive input messages for.
In your message loop, use the GetMessage
function to retrieve the input messages that are sent to your application.
When you receive a raw input message, check the RAWINPUTHEADER
structure to determine which device it is from.
If the device is a mouse, cast the RAWINPUT
structure to a RAWMOUSE
structure and examine its members to determine the mouse input.
Here is some sample code that demonstrates how to capture mouse input using the Raw Input API in C++:
#include <Windows.h>
// Handle raw input messages
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_INPUT:
{
// Get size of the raw input data
UINT size;
GetRawInputData((HRAWINPUT)lParam, RID_INPUT, NULL, &size, sizeof(RAWINPUTHEADER));
// Allocate memory for the raw input data
LPBYTE data = new BYTE[size];
if (data == NULL) {
return 0;
}
// Get the raw input data
if (GetRawInputData((HRAWINPUT)lParam, RID_INPUT, data, &size, sizeof(RAWINPUTHEADER)) == size)
{
RAWINPUT* raw = (RAWINPUT*)data;
// Check if the input is from a mouse
if (raw->header.dwType == RIM_TYPEMOUSE)
{
RAWMOUSE* mouse = &raw->data.mouse;
// Process mouse input here
// mouse->usButtonFlags contains button state information
// mouse->lLastX, mouse->lLastY contain relative mouse position information
}
}
delete[] data;
return 0;
}
}
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
int main()
{
// Create window and register for raw input
HWND hwnd = CreateWindowEx(
0,
L"STATIC", L"Raw Input Window",
WS_POPUP, 0, 0, 640, 480,
NULL, NULL, NULL, NULL);
RAWINPUTDEVICE rid;
rid.usUsagePage = 1;
rid.usUsage = 2;
rid.dwFlags = RIDEV_INPUTSINK;
rid.hwndTarget = hwnd;
RegisterRawInputDevices(&rid, 1, sizeof(RAWINPUTDEVICE));
// Enter message loop
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
This code creates a window and registers for raw input from mice using the RIDEV_INPUTSINK
flag. The WindowProc
function processes the raw input messages and extracts the mouse input using the RAWMOUSE
structure. The message loop uses the GetMessage
function to retrieve messages and dispatches them to the WindowProc
function using the DispatchMessage
function.