アノテーション レイヤーに代替シンボルを追加する方法(色のみ指定)

Dim pSymbolSubstitution  As ISymbolSubstitution = pLayer
pSymbolSubstitution.SubstituteType = esriSymbolSubstituteType.esriSymbolSubstitulor

Dim pColor As IRgbColor = New RgbColorClass()
pColor.Red = 255

pSymbolSubstitution.MassColor = pColor

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