谢谢
也在网上搜到https://www.cnblogs.com/JJBox/p/11610343.html#_label1
Dim cd = New Autodesk.AutoCAD.Windows.ColorDialog()
Dim dr = cd.ShowDialog()
If dr = System.Windows.Forms.DialogResult.OK Then
ed.WriteMessage(vbLf & "CAD颜色选择了: " & cd.Color.ToString())
CmdTest_ShowDialog = cd.Color.ColorIndex '.ColorValue