问题
I tried using global hook, and when I typed in using gma.System.Windows; it did not recognize gma? What do I need to do?
回答1:
It looks like you may be using code from this CodeProject article. You need to reference the assembly / source code from that article. Also, you need to type Gma. rather than gma. -- C# is case sensitive.
回答2:
If you want to stay inside the C# world, you are restricted to low-level hooks only. There is some code here and here.
来源：https://stackoverflow.com/questions/2079111/how-to-use-global-hook