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HasAlphaChannel Property [Publisher 2003 VBA Language Reference]

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MsoTriState

MsoTriState can be one of these MsoTriState constants.
msoCTrue Not used with this property.
msoFalse The specified picture does not contain an alpha channel.
msoTriStateMixed Indicates a combination of msoTrue and msoFalse for the specified shape range.
msoTriStateToggle Not used with this property.
msoTrue The specified picture contains an alpha channel.

expression.HasAlphaChannel()

expression Required. An expression that returns a PictureFormat object.

Remarks

An alpha channel is a special 8-bit channel used by some image processing software to contain additional data, such as masking or transparency information.

Example

The following example returns whether the first shape on the first page of the active publication contains an alpha channel. If the picture is linked, and the original picture contains an alpha channel, that is also returned. This example assumes the shape is a picture.

With ActiveDocument.Pages(1).Shapes(1).PictureFormat
    If .HasAlphaChannel = msoTrue Then
        Debug.Print .Filename
        Debug.Print "This picture contains an alpha channel."
        
        If .IsLinked = msoTrue Then
            If .OriginalHasAlphaChannel = msoTrue Then
                Debug.Print "The linked picture " & _
                "also contains an alpha channel."
            End If
        End If
    End If
End With

Applies to | PictureFormat Object