The SkewAngle property returns or specifies the degree of slant for a pattern fill.
Examples:
The following VBA example applies a brick fill pattern to a rectangle. The pattern is rotated by 30° counterclockwise and slanted by 10° to the left.
Sub Test()
Dim s As Shape
Dim pf As PatternFill
Set s = ActiveLayer.CreateRectangle(0, 0, 4, 4)
Set pf = s.Fill.ApplyPatternFill(cdrTwoColorPattern, , 4)
pf.RotationAngle = 30
pf.SkewAngle = 10
End Sub