祖传代码 
; 输入法切换
SwitchIME(dwLayout) {
    hWnd := WinGetID("A")
    threadID := DllCall("GetWindowThreadProcessId", "UInt", hWnd, "UInt", 0)
    
    result := DllCall("ActivateKeyboardLayout", "UInt", dwLayout, "UInt", 0x100)
    
    if (result) {
        DllCall("SendMessage", "UInt", hWnd, "UInt", 0x50, "UInt", 0, "UInt", dwLayout)
    }
}

; 按 RCtrl 切换为英文输入法
RCtrl::{
    SwitchIME(0x04090409)
}...