Go语言MessageBox用法实例

本文实例讲述了go语言messagebox用法。分享给大家供大家参考。具体如下：

package main
import (
       "syscall"
       "unsafe"
       "fmt"
)
func abort(funcname string, err int) {
       panic(funcname + " failed: " + syscall.errno(err).error())
}
var (
       kernel32, _ = syscall.loadlibrary("kernel32.dll")
       getmodulehandle, _ = syscall.getprocaddress(kernel32, "getmodulehandlew")
       user32, _ = syscall.loadlibrary("user32.dll")
       messagebox, _ = syscall.getprocaddress(user32, "messageboxw")
)
const (
       mb_ok                      = 0x00000000
       mb_okcancel                = 0x00000001
       mb_abortretryignore        = 0x00000002
       mb_yesnocancel             = 0x00000003
       mb_yesno                   = 0x00000004
       mb_retrycancel             = 0x00000005
       mb_canceltrycontinue       = 0x00000006
       mb_iconhand                = 0x00000010
       mb_iconquestion            = 0x00000020
       mb_iconexclamation         = 0x00000030
       mb_iconasterisk            = 0x00000040
       mb_usericon                = 0x00000080
       mb_iconwarning             = mb_iconexclamation
       mb_iconerror               = mb_iconhand
       mb_iconinformation         = mb_iconasterisk
       mb_iconstop                = mb_iconhand
       mb_defbutton1              = 0x00000000
       mb_defbutton2              = 0x00000100
       mb_defbutton3              = 0x00000200
       mb_defbutton4              = 0x00000300
)
func messagebox(caption, text string, style uintptr) (result int) {
       // var hwnd hwnd
       ret, _, callerr := syscall.syscall6(uintptr(messagebox), 4,
               0, // hwnd
               uintptr(unsafe.pointer(syscall.stringtoutf16ptr(text))), // text
               uintptr(unsafe.pointer(syscall.stringtoutf16ptr(caption))), // caption
               style, // type
               0,
               0)
       if callerr != 0 {
               abort("call messagebox", int(callerr))
       }
       result = int(ret)
       return
}
func main() {
       defer syscall.freelibrary(kernel32)
       defer syscall.freelibrary(user32)
       fmt.printf("retern: %d\n", messagebox("done title", "this test is done.", mb_yesnocancel))
}
func init() {
       fmt.print("starting up\n")
}

希望本文所述对大家的go语言程序设计有所帮助。