1. Direct Input Architecture

1. Enumerate system devices by ID using DirectInput8Create
2. Call CreateDevice using the ID for the device to get a list of device components
3. Use g_pKeyboard->SetDataFormat to determine what key has been pressed or g_pMouse->SetDataFormat to determine which mouse keys have been pressed and the mouse position.
4. Call GetDeviceState to determine the current status of a device

2. Obtaining the Device ID for the KeyBoard

1. Create a Dialog resource IDD_DIRECTINPUT
2. Include the following controls on the dialog:
   

   IDC_CREATEDEVICE	m_create_device(CButton)
   IDC_DATA (CString)	m_data
   IDC_EXCLUSIVE (int,CButton)	m_exclusive & m_exclusive_control
   IDC_FOREGROUND (int,CButton)	m_foreground & m_foreground_control
   IDC_FREE_DEVICE(CButton)	m_free_device_control
   IDC_IMMEDIATE (int,CButton)	m_immediate and m_immediate_control
   IDC_WINDOWSKEY (BOOL, CButton)	m_windowskey and m_windowskey_control

3. Use the Class Wizard to create a Class called CDirectInput1View associated with IDD_DIRECTINPUT.
   Make sure you select CFormView as the parent class type.
   
4. Create a Message Map for IDC_CREATEDEVICE call OnCreateDevice, so when the user press the Create Device Button the OnCreatedevice method is invoked.
   
5. Add the following defines to the CDirectInput1View.h file.
   
   #define SAFE_DELETE(p) { if(p) { delete (p); (p)=NULL; } }
#define SAFE_RELEASE(p) { if(p) { (p)->Release(); (p)=NULL; } }

#define SAMPLE_BUFFER_SIZE 8 // arbitrary number of buffer elements

LPDIRECTINPUT8 g_pDI = NULL;
LPDIRECTINPUTDEVICE8 g_pKeyboard = NULL;
   
6. Replace the #include "directinputview.h" statement with #include "directinput1view.h" in the directinputview.cpp source.
   
CMultiDocTemplate* pDocTemplate;
pDocTemplate = new CMultiDocTemplate(
      IDR_DIRECTTYPE,
      RUNTIME_CLASS(CDirectinputDoc),
      RUNTIME_CLASS(CChildFrame),
      RUNTIME_CLASS(CDirectInput1View));
AddDocTemplate(pDocTemplate);

7. Create a Message Map for IDC_CREATEDEVICE using the wizard. This code will be inserted into the directinput1view.cpp source code.
   
   void CDirectInput1View::OnCreatedevice()
{
   
   /*
   The CreateKeyBoardDevice is describe in the method below.
   The AfxGetMainWnd() macro returns the MainWnd object.
   MFC hierarchy is composed first of an application
   then MainFrame which has a main window, and last
   the view.  Returning m_hWnd gives the current
   view window handle so using AfxGetMainWnd is
   used instead.
   */
   

      if( NULL == g_pKeyboard )
       {
          if( FAILED( CreateKeyBoardDevice(AfxGetMainWnd()->m_hWnd) ) )
           {
               MessageBox( _T("CreateDevice() failed. ")
                            _T("The sample will now exit."),
                                 _T("Keyboard"), MB_ICONERROR | MB_OK );
               FreeDirectInput();
           }
       }
       else
       {
           FreeDirectInput();
       }

}