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Two Joystick and DirectInput

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I want to write a game program can support two joystick(USB head) Now I success to control player one's joystick. But how to I control player two's joystick. What I should set DirectInput to support two joystick? Do any webs have any sample or book mentioned it? My Source Code as below: case JOYSTICK: if(FAILED(m_Input->GetDirectInputCOM()->EnumDevices(DI8DEVCLASS_GAMECTRL, EnumJoysticks, this, DIEDFL_ATTACHEDONLY))) return FALSE; if(m_pDIDevice == NULL) return FALSE; DataFormat = (DIDATAFORMAT*)&c_dfDIJoystick; break; // Set the windowed usage m_Windowed = Windowed; // Set the data format of keyboard if(FAILED(m_pDIDevice->SetDataFormat(DataFormat))) return FALSE; // Set the cooperative level - Foreground & Nonexclusive if(FAILED(m_pDIDevice->SetCooperativeLevel(m_Input->GethWnd(), DISCL_FOREGROUND | DISCL_NONEXCLUSIVE))) return FALSE; // Set the special properties if it's a joystick if(Type == JOYSTICK) { // Set the special properties of the joystick - range DIprg.diph.dwSize = sizeof(DIPROPRANGE); DIprg.diph.dwHeaderSize = sizeof(DIPROPHEADER); DIprg.diph.dwHow = DIPH_BYOFFSET; //DIprg.diph.dwHow = DIPH_BYID; DIprg.lMin = -1024; DIprg.lMax = +1024; // Set X range DIprg.diph.dwObj = DIJOFS_X; if(FAILED(m_pDIDevice->SetProperty(DIPROP_RANGE, &DIprg.diph))) return FALSE; // Set Y rangine DIprg.diph.dwObj = DIJOFS_Y; if(FAILED(m_pDIDevice->SetProperty(DIPROP_RANGE, &DIprg.diph))) return FALSE; // Set the special properties of the joystick - deadzone 12% DIpdw.diph.dwSize = sizeof(DIPROPDWORD); DIpdw.diph.dwHeaderSize = sizeof(DIPROPHEADER); DIpdw.diph.dwHow = DIPH_BYOFFSET; DIpdw.dwData = 128; // Set X deadzone DIpdw.diph.dwObj = DIJOFS_X; if(FAILED(m_pDIDevice->SetProperty(DIPROP_DEADZONE, &DIpdw.diph))) return FALSE; // Set Y deadzone DIpdw.diph.dwObj = DIJOFS_Y; if(FAILED(m_pDIDevice->SetProperty(DIPROP_DEADZONE, &DIpdw.diph))) return FALSE;

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