DashStyle Property

Microsoft PowerPoint Visual Basic

Returns or sets the dash style for the specified line. Read/write MsoLineDashStyle.

MsoLineDashStyle can be one of these MsoLineDashStyle constants.
msoLineDash
msoLineDashDot
msoLineDashDotDot
msoLineDashStyleMixed
msoLineLongDash
msoLineLongDashDot
msoLineRoundDot
msoLineSolid
msoLineSquareDot

expression.DashStyle

expression    Required. An expression that returns one of the objects in the Applies To list.

Example

This example adds a blue dashed line to myDocument.

Set myDocument = ActivePresentation.Slides(1)
With myDocument.Shapes.AddLine(10, 10, 250, 250).Line
    .DashStyle = msoLineDashDotDot
    .ForeColor.RGB = RGB(50, 0, 128)
End With