Change the properties of pictures

[SP]

Hi;
I am using VB6 to read a microsoft word doc, i have a problem in
converting shape to inlineShape, below is my code:
Dim shp as shape

For each shp in ActiveDocument.shapes
shp.convertToInlineShape
next

I understand that shape has many msoShapeType, does this determine on
whether a shape can be converted to inlineShape? and if it is, can it still
be converted to inlineShape by using other method? Hope you can help me,
thank you.