GetKeyFocusWnd 得到可以发送按键消息的窗口
获取当前键盘焦点的窗口句柄
整数型,窗口句柄

RunApp "notepad.exe"
Delay 1000
hwnd=Plugin.Window.GetKeyFocusWnd()
Call Plugin.Bkgnd.KeyDown(hwnd,asc("A"))
Call Plugin.Bkgnd.KeyUp(hwnd,asc("A"))
Call Plugin.Bkgnd.KeyPress(hwnd,asc("B")) 

VBSCall RunApp("notepad.exe")
Delay 1000
Plugin hwnd=Window.GetKeyFocusWnd()
Plugin Bkgnd.KeyDown(hwnd,asc("A"))
Plugin Bkgnd.KeyUp(hwnd,asc("A"))
Plugin Bkgnd.KeyPress(hwnd,asc("B"))