Very good suggestion, and it would be nice if it could be implemented without significantly increasing system resources.
I often agony with errors when executing scripts in Chinese input method state.

非常好的建议，如果能在不显著增加系统资源的前提下实现的话，就更好了。
经常为在中文输入法状态下执行脚本时出现错误苦恼。

Hi Rob, thank you very much for your reply.
I just tried to reproduce the error, but it didn't work, probably because I just upgraded from win7 to win10 last month.
Previously, when using GooglePinyin or BingPinyin on Win7, if I forget to switch back to English input, an error will appear.
For example, the following script is executed in Excel.
// Selective Paste (Unicode)
sp.SendKeys("^%v");
sp.Sleep(100);
sp.SendKeys("u");
sp.Sleep(50);
sp.SendKeys("{ENTER}");

Now I have upgraded to Win10 and use Microsoft Pinyin, no more errors.
Thanks again!

Rob您好，非常感谢您的回复。
刚才尝试重现错误，但是没有成功，可能是我上个月刚刚由win7升级到win10的原因。
以前，在win7系统使用GooglePinyin或BingPinyin时，如果忘记切换回英文输入状态，会出现错误。
例如：在Excel中执行如下脚本：
// 选择性粘贴（Unicode）
sp.SendKeys("^%v");
sp.Sleep(100);
sp.SendKeys("u");
sp.Sleep(50);
sp.SendKeys("{ENTER}");
目前我已经升级到win10系统并使用微软拼音，没再出现错误。
再次表示感谢！