keyboardの初期化です。

GameInput::Init
input->CreateDevice( GUID_SysKeyboard, &keyboard, NULL );
keyboard->SetDataFormat( &c_dfDIKeyboard );
keyboard->SetCooperativeLevel( Window.Handle(), DISCL_FOREGROUND|DISCL_NONEXCLUSIVE );
{
DIPROPDWORD dipd = {};

dipd.diph.dwSize = sizeof( DIPROPDWORD );
dipd.diph.dwHeaderSize = sizeof( DIPROPHEADER );
dipd.diph.dwObj = 0;
dipd.diph.dwHow = DIPH_DEVICE;
dipd.dwData = 8;

keyboard->SetProperty( DIPROP_BUFFERSIZE, &dipd.diph );
}
keyboard->Acquire();

GameInput::Free
if ( keyboard ) {
keyboard->Unacquire();
keyboard = NULL;
}