C # example of calling winmm. DLL to play music [reprinted]

Using system;

Using system. text;

Using system. runtime. interopservices;


Namespace music

{

/** // <Summary>

///

/// </Summary>

Public class audio

{

[Dllimport ("winmm. dll")]

Private Static extern int mcisendstring

(

String lpstrcommand,

String lpstrreturnstring,

Int ureturnlength,

Int hwndcallback

);


[Dllimport ("kernel32.dll", charset = charset. Auto)]

Public static extern int get1_pathname

(

[Financialas (unmanagedtype. lptstr)] string path,

[Financialas (unmanagedtype. lptstr)] stringbuilder implements path,

Int limit pathlength

);


Public audio ()

{


}


Public void play (string filename)

{

Stringbuilder export pathtemp = new stringbuilder (255 );

Int result = getmediapathname (filename, effecpathtemp, effecpathtemp. capacity );

String export Path = export pathtemp. tostring ();


Mcisendstring ("open" + export path + "alias song );

Mcisendstring ("play song", "", 0, 0 );

}


Public void stop ()

{

Mcisendstring ("Stop song", "", 0, 0 );

}


Public void pause ()

{

Mcisendstring ("Pause song", "", 0, 0 );

}


Public void close ()

{

Mcisendstring ("Close song", "", 0, 0 );

}

}

}