[问题求助] VBS为什么不能设置balloon对象的backcolor和forecolor？

Wsh.sleep 1*1000
	strAgentName = "Merlin" 
	strAgentPath = "c:\windows\msagent\chars\" & strAgentName & ".acs" 
	ScriptComplete=0 
	
	Set objAgent = WScript.CreateObject("Agent.Control.2","agent_") 
	objAgent.Connected = True 
	objAgent.Characters.Load strAgentName, strAgentPath
	objCharacter.MoveTo 100, 700 
	objCharacter.Show 
	With bln
		.backcolor=RGB(255,0,0)
		.fontsize=20
		.forecolor=vbRed
		.fontname="华文楷体"
		.visible=False
		.style=3
		.fontunderline=True
		.numberoflines=10
	End With
	wsh.sleep 1000
	objcharacter.speak "测试123!"
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