go語言讓windows發出聲音，或者播放音樂

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                    go語言讓windows發出聲音，或者播放音樂的例子：會發出alert警告的聲音

 

                    ( 這是我應群員的求助寫的， 如果你需要瞭解其中的調用原理或過程 或更多go語言調用win32api的資料，加群： 218160862 , 答案我告訴你)

 

                           package main

                            func main(){ 

                                     winSound()

                            }

 

                            // golang 讓windows發出警告的聲音  todo 需要完善播放mp3之類

                            func winSound(  )  {

                                     funInDllFile, err := syscall.LoadLibrary("Winmm.dll") // 調用的dll檔案

                                     if err != nil {

                                               print("cant not call : syscall.LoadLibrary , errorInfo :" + err.Error())

                                     }

                                     defer syscall.FreeLibrary(funInDllFile)

                                     // 調用的dll裡面的函數是：

                                     funName := "PlaySound"

 

                                     // 註冊一長串調用代碼，簡化為 _win32Fun 變數.

                                     win32Fun, err := syscall.GetProcAddress(syscall.Handle(funInDllFile), funName) 

 

                                     // 通過syscall.Syscall6()去調用win32的xxx函數，因為xxx函數有3個參數,故需取Syscall6才能放得下. 最後的3個參數,設定為0即可

                                     _, _, err = syscall.Syscall6(

                                               uintptr(win32Fun),                                                                             // 調用的函數名

                                               3,                                                                                                     // 指明該函數的參數數量

                                              

                                               uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr("alert") ) ),                    // 該函數的參數1. 可通過msdn尋找函數名 查參數含義

                                               // SystemStart

                                               uintptr( 0 ),                                                                                       // 該函數的參數2.                                  

                                               uintptr( 0 ),                                                                                       // 該函數的參數3.               

                                                                                            

                                               0,                                                   

                                               0,                                                   

                                               0 )             

                            }