IndentLevel Property
Returns or sets the the indent level for the specified text as an integer from 1 to 5, where 1 indicates a first-level paragraph with no indentation. Read/write Long.
Example
This example indents the second paragraph in shape two on slide two in the active presentation.
Application.ActivePresentation.Slides(2).Shapes(2).TextFrame _
.TextRange.Paragraphs(2).IndentLevel = 2