Go语言：获取指定标题程序的句柄

代码实例：

---

package main

import (
    "syscall"

    "github.com/lxn/win"
)

func main() {
    println(FindWindow(`QQ`))
}

func FindWindow(str string) win.HWND {
    return win.FindWindow(nil, syscall.StringToUTF16Ptr(str))
}