float p_Zoom = 1.0f;D3DXMATRIX ProjectionMatrix;D3DXMatrixPerspectiveFovRH( &ProjectionMatrix, p_Zoom, 640.0f/480.0f, p_MinViewDistance, p_MaxViewDistance );
Now you only need to update the ''p_Zoom'' variable
KaMiKaZe
float p_Zoom = 1.0f;D3DXMATRIX ProjectionMatrix;D3DXMatrixPerspectiveFovRH( &ProjectionMatrix, p_Zoom, 640.0f/480.0f, p_MinViewDistance, p_MaxViewDistance );