void UpdateCursor()

Reads the activator's mouse input and turns it into cursor motion. Takes the following cvars into account so that the cursor is not affected by game mouse settings:

• mouse_sensitivity
• m_yaw
• m_pitch
• invertmouse

This function needs to be called in a loop.

while (true)
{
    UpdateCursor();
    DrawCursor(CursorX(), CursorY());
    Delay(1);
}