Step 2: Setting the Mouse Data Format

After retrieving an IDirectInputDevice8 pointer, your application must set the device's data format. For mouse devices, this is a very simple task. Call the IDirectInputDevice8::SetDataFormat method, specifying the data format provided for your convenience by Microsoft® DirectInput® in the c_dfDIMouse global variable.

The following code fragment attempts to set the device's data format. If the call fails, FALSE is returned.

hr = g_pMouse->SetDataFormat(&c_dfDIMouse);
 
if (FAILED(hr)) {
    return FALSE;
}

After setting the mouse data format, go to Step 3: Setting the Mouse Behavior.