lpha</span> property is $00, the bitmap 
  will be fully transparent, if it is equal to $FF, only per-pixel opacity, stored 
  in bitmap’s alpha channel is used. This property is used only for bitmap blending, 
  it does not affect pixel/line drawing and other similar routines. </p>
<p class="Body">When blending bitmaps in dmCustom draw mode, this property may 
  be used for other purposes. Custom combining routine may use all 32 bits of 
  <span class="EmptyRef">MasterAlpha</span>. </p>
<p class="Body">I