void D3D_CUSTOMMATRIX::SetView( void )
{
	static float CamX = 0.0f;
	static float CamY = 1.0f;
	static float CamZ = 30.0f;
	static float CamRotX = 0.0f;

	if( KEY_DOWN('A') )
	{
		CamX += 0.5f;
	}

	if( KEY_DOWN('D') )
	{
		CamX -= 0.5f;
	}

	if( KEY_DOWN('W') )
	{
		CamZ-= 0.5f;
	}
	
	if( KEY_DOWN('S') )
	{
		CamZ += 0.5f;
	}

	if( KEY_DOWN(VK_LEFT) )
	{
		CamRotX += 1.0f;
	}

	if( KEY_DOWN(VK_RIGHT) )
	{
		CamRotX -= 1.0f;
	}
	
	D3DXMatrixLookAtLH( &View,
                       &D3DXVECTOR3(CamX, CamY, CamZ),    
                       &D3DXVECTOR3(CamX + CamRotX, 0.0f, 0.0f),    
                       &D3DXVECTOR3(0.0f, 1.0f, 0.0f) );
	
	return;
}

[Source]//here is a camera class set it up like thisCamera::Camera(){	_cameraType = AIRCRAFT;	_pos   = D3DXVECTOR3(0.0f, 0.0f, 0.0f);	_right = D3DXVECTOR3(1.0f, 0.0f, 0.0f);	_up    = D3DXVECTOR3(0.0f, 1.0f, 0.0f);	_look  = D3DXVECTOR3(0.0f, 0.0f, 1.0f);}Camera::Camera(CameraType cameraType){	_cameraType = cameraType;	_pos   = D3DXVECTOR3(0.0f, 0.0f, 0.0f);	_right = D3DXVECTOR3(1.0f, 0.0f, 0.0f);	_up    = D3DXVECTOR3(0.0f, 1.0f, 0.0f);	_look  = D3DXVECTOR3(0.0f, 0.0f, 1.0f);}Camera::~Camera(){}void Camera::getPosition(D3DXVECTOR3* pos){	*pos = _pos;}void Camera::setPosition(D3DXVECTOR3* pos){	_pos = *pos;}void Camera::getRight(D3DXVECTOR3* right){	*right = _right;}void Camera::getUp(D3DXVECTOR3* up){	*up = _up;}void Camera::getLook(D3DXVECTOR3* look){	*look = _look;}void Camera::walk(float units){	// move only on xz plane for land object	if( _cameraType == LANDOBJECT )		_pos += D3DXVECTOR3(_look.x, 0.0f, _look.z) * units;	if( _cameraType == AIRCRAFT )		_pos += _look * units;}void Camera::strafe(float units){	// move only on xz plane for land object	if( _cameraType == LANDOBJECT )		_pos += D3DXVECTOR3(_right.x, 0.0f, _right.z) * units;	if( _cameraType == AIRCRAFT )		_pos += _right * units;}void Camera::fly(float units){	// move only on y-axis for land object	if( _cameraType == LANDOBJECT )		_pos.y += units;	if( _cameraType == AIRCRAFT )		_pos += _up * units;}void Camera::pitch(float angle){	D3DXMATRIX T;	D3DXMatrixRotationAxis(&T, &_right,	angle);	// rotate _up and _look around _right vector	D3DXVec3TransformCoord(&_up,&_up, &T);	D3DXVec3TransformCoord(&_look,&_look, &T);}void Camera::yaw(float angle){	D3DXMATRIX T;	// rotate around world y (0, 1, 0) always for land object	if( _cameraType == LANDOBJECT )		D3DXMatrixRotationY(&T, angle);	// rotate around own up vector for aircraft	if( _cameraType == AIRCRAFT )		D3DXMatrixRotationAxis(&T, &_up, angle);	// rotate _right and _look around _up or y-axis	D3DXVec3TransformCoord(&_right,&_right, &T);	D3DXVec3TransformCoord(&_look,&_look, &T);}void Camera::roll(float angle){	// only roll for aircraft type	if( _cameraType == AIRCRAFT )	{		D3DXMATRIX T;		D3DXMatrixRotationAxis(&T, &_look,	angle);		// rotate _up and _right around _look vector		D3DXVec3TransformCoord(&_right,&_right, &T);		D3DXVec3TransformCoord(&_up,&_up, &T);	}}void Camera::getViewMatrix(D3DXMATRIX* V){	// Keep camera's axes orthogonal to eachother	D3DXVec3Normalize(&_look, &_look);	D3DXVec3Cross(&_up, &_look, &_right);	D3DXVec3Normalize(&_up, &_up);	D3DXVec3Cross(&_right, &_up, &_look);	D3DXVec3Normalize(&_right, &_right);	// Build the view matrix:	float x = -D3DXVec3Dot(&_right, &_pos);	float y = -D3DXVec3Dot(&_up, &_pos);	float z = -D3DXVec3Dot(&_look, &_pos);	(*V)(0,0) = _right.x; (*V)(0, 1) = _up.x; (*V)(0, 2) = _look.x; (*V)(0, 3) = 0.0f;	(*V)(1,0) = _right.y; (*V)(1, 1) = _up.y; (*V)(1, 2) = _look.y; (*V)(1, 3) = 0.0f;	(*V)(2,0) = _right.z; (*V)(2, 1) = _up.z; (*V)(2, 2) = _look.z; (*V)(2, 3) = 0.0f;	(*V)(3,0) = x;        (*V)(3, 1) = y;     (*V)(3, 2) = z;       (*V)(3, 3) = 1.0f;}void Camera::setCameraType(CameraType cameraType){	_cameraType = cameraType;}[/Source]