Windows Media Player application sample code analysis (mobile 6.5.3)

The code namedWmpsampleDemonstrates how to use the Windows Media Player ATL control from a Win32 application.

1. Download exampleCode

You can find the sample code from the example "Windows Mobile 6.5.3 dtk \ samples \ pocketpc \ CPP \ ATL \ wmpsample" in the example of mobile 6.5.3 professional dtk.

2. Prepare the development environment

My development environments

OS:Windows 7

SDK:Windows Mobile 6.5.3 professional dtk

Development Environment:Visual Studio 2008

3. Deploy and run in the simulator

3.1 open the properties page of Solution "wmpsample" and click "Configuration Manager" to modify the deployed platform.

Modify the deployment device to Windows Mobile 6.5.3 professional emulator.

3.2 regenerate and run the solution. Running result

4. parse the solution for implementing the player

4.1 wmpsample. cpp

It contains initialization code for the application.

If premessageloop reutrn OK, then the program continuously runs with runmessageloop () and postmessageloop ().

4.2 mainwindow. cpp

The main message processing function is in this CPP.

4.2.1 process creat messages

A) initilaize the menu bar

B) initialize WMP window
Atlaxwininit ();
Getclientrect (hwnd, & rcclient );
Verify (systemparametersinfo (spi_getworkarea, 0, & rcmainwindow, 0 ));
Rcclient. Bottom-= rcmainwindow. Top;

C) Create WMP Control
_ Atlmodule. m_app1_1_m_wmplayer.create (hwnd, rcclient, text ("{6bf52a52-394a-11d3-b153-00c04f79faa6 }"),
Ws_child | ws_visible | ws_border, 0 );
CBR (_ atlmodule. m_app1_1_m_wmplayer.m_hwnd! = NULL );

HR = _ atlmodule. m_app1_1_m_wmplayer.querycontrol (& (_ atlmodule. m_app1_1_m_spwmpplayer ));
CHR (HR );

HR = ccomwmpeventdispatch: createinstance (& peventlistener );
CHR (HR );

Speventlistener = peventlistener;
HR = _ atlmodule. m_appwindow.m_spwmpplayer-> QueryInterface (& spconnectioncontainer );
CHR (HR );

4.2.1 process opened messages

Main functions: In the pop-up dialog box, select a file and play it back.

A) Select a file

Openfilenameex ofn;

Tchar szfilename [_ max_path]; // name of the opened file

Memset (& ofn, 0, sizeof (ofn); // initialize structure to 0/null
Szfilename [0] = text ('\ 0 ');
Ofn. lstructsize = sizeof (ofn );
Ofn. lpstrfile = szfilename;
Ofn. nmaxfile = arraysize (szfilename );
Ofn. Flags = ofn_hidereadonly | ofn_filemustexist | ofn_explorer;
Ofn. lpstrfilter = text ("all media files \ 0 *. WMA ;*. MP3 ;*. MPEG ;*. avi ;*. WMV ;*. ASF ;*. wav ;*. mid ;*. DVR-ms ;*. mid ;*. RMI ;*. MIDI ;*. WM ;*. SND ;*. AU ;*. AIF ;*. MPG ;*. m1v ;*. MP2 ;*. MPA \ 0 ");
Ofn. hwndowner = hwnd;
Ofn. hinstance = _ atlbasemodule. getresourceinstance ();

CBR (getopenfilenameex (& ofn ));

// Close the dialog of the selected file
Enddialog (hwnd, idok );

B) Play
HR = _ atlmodule. m_app1_1_m_spwmpplayer-> put_url (ccombstr (szfilename ));

4.2.3 process the playback and paused messages of Control Files

_ atlmodule. m_appwindow.m_spwmpplayer-> get_controls (& spwmpcontrols);
If (fplaypause)
{< br> spwmpcontrols-> pause ();
}< br> else
{< br> spwmpcontrols-> play ();
}< br> fplaypause =! Fplaypause;