delphi - How to set the MirrorType/Stretch options of a slide background in PowerPoint -

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i can background image exported, however, when set background tiled "mirror type" option set "both" default. want set "none" , want able set of offsets in stetch options.

i have imported 2010 type library delphi can't seem find these options anywhere. tried messing macros in 2010 still couldn't seem see it. tried options thought strecth options e.g. left/incrementleft etc kept getting exceptions like:

"shaperange (unknown member): invalid request. operation can't applied background shape."

here doing @ moment:

    slide.background.fill.userpicture('c:\path\to\image.jpg')     if dotile     begin         slide.background.fill.texturetile := msotrue         // need set mirror type none     end     else         // need change of stretch offsets


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