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PictureFormat.HasAlphaChannel Property (Publisher)

office 365 dev account|Last Updated: 8/24/2017
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3 Contributors

Returns an MsoTriState constant indicating whether the specified picture contains an alpha channel. Read-only.

Syntax

expression. HasAlphaChannel

_expression_A variable that represents a PictureFormat object.

Return Value

MsoTriState

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.

The HasAlphaChannel property value can be one of the MsoTriState constants declared in the Microsoft Office type library and shown in the following table.

ConstantDescription
msoFalseThe specified picture does not contain an alpha channel.
msoTriStateMixedIndicates a combination of msoTrue and msoFalse for the specified shape range.
msoTrueThe specified picture contains an alpha channel.

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 
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