Using the Windows Media Player Control on Handheld Devices
Using WMP OCX from a Web Application
In case you are using a Web browser, hosting WMP is the easiest thing (this is a SDK sample):
<HTML>
<HEAD>
</HEAD>
<BODY>
<OBJECT>
ID=wmpocx
WIDTH=200
HEIGHT=150
CLASSID="clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6"
TYPE="application/x-oleobject"
VIEWASTEXT>
<PARAM name="uimode" value="none">
</OBJECT>
<BR>
<script for="wmpocx" event="PlayStateChange(NewState)"
language="JScript">ClipPlayState(NewState);
</script>
<script for="wmpocx" event="Error()"
language="JScript">StopPlayer();
</script>
<p>
<a href=# OnClick='PlayClip("\storage card\webapp\glass.wmv",
ImgVideoPlay, true)'>
<IMG id="ImgVideoPlay" src="bt_play.gif" border="0"></a> Video
<br>
<a href=# OnClick='PlayClip("\storage card\webapp\jeanne.wma",
ImgAudioPlay, false)'>
<IMG id="ImgAudioPlay" src="bt_play.gif" border="0"></a> Audio
<br>
Play state sequence
<br>
<input type="text" id="PlayStateSequence" width=30>
<SCRIPT language="JScript">
<!--
var CurrentPlayImage = null;
var bVideo = null;
var bWasBuffering = false;
function StopPlayer()
{
wmpocx.controls.stop();
wmpocx.close();
if (CurrentPlayImage != null)
{
CurrentPlayImage.src = "bt_play.gif";
}
bWasBufferring = false;
}
function ClipPlayState(NewState)
{
PlayStateSequence.value = PlayStateSequence.value + NewState
+ " ";
switch(NewState)
{
case 1: // stopped
if (bWasBuffering)
{
bWasBufferring = false;
if (CurrentPlayImage != null)
{
CurrentPlayImage.src = "bt_play.gif";
}
}
break;
case 6: // buffering
bWasBufferring = true;
if (CurrentPlayImage != null)
{
CurrentPlayImage.src = "bt_load.gif";
}
break;
case 9: // transitioning
case 11: // reconnecting
bWasBufferring = false;
break;
case 3: // playing
if (bWasBufferring)
{
if (CurrentPlayImage != null)
{
CurrentPlayImage.src = "bt_stop.gif";
}
if (bVideo)
{
wmpocx.fullScreen = true;
}
}
break;
default:
}
}
function PlayClip(url, img, video)
{
if (wmpocx.playState == 3 && bVideo != null && bVideo != video)
{
return;
}
bVideo = video;
CurrentPlayImage = img;
if (wmpocx.playState == 3)
{
StopPlayer();
}
else
{
PlayStateSequence.value = "";
if (CurrentPlayImage != null)
{
CurrentPlayImage.src = "bt_load.gif";
}
wmpocx.URL = url;
}
}
-->
</SCRIPT>
</BODY>
</HTML>
Obviously, you can decorate this HTML as you want to.
Working with Older Versions of the WMP Control
If you have a handheld device without WMP 10, this is yet not the end of the world. You still have an opportunity to use WMP OCX of version 8 for Pocket PC, which has much fewer amazing features, but can serve your needs as well. For exercise purposes, I've created a simple project to illustrate how it works in an MFC environment. The small code snippet below proves that it is pretty similar to the ATL way:
BOOL CWMP8SampleDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Set the icon for this dialog. The framework does this
// automatically when the application's main window is not
// a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
CenterWindow(GetDesktopWindow()); // center to the hpc screen
CRect rect;
m_Panel.GetClientRect(&rect);
if ( m_PlayerWnd.CreateControl(__uuidof(WMP),L"",
WS_VISIBLE|WS_CHILD,rect,
&m_Panel,AFX_IDW_PANE_FIRST) )
{
LPUNKNOWN lpUnk = m_PlayerWnd.GetControlUnknown();
HRESULT hr = lpUnk->QueryInterface(__uuidof(IWMP),(void**)
&m_spWMPPlayer);
}
else
{
AfxMessageBox(L"Failed to create WMP control");
::PostQuitMessage(0);
return 0;
}
if ( m_spWMPPlayer )
{
m_WMPEvents.m_pMainDlg = (CWMP8SampleDlg*)this;
CComPtr<IConnectionPointContainer> spConnectionContainer;
HRESULT hr = m_spWMPPlayer->
QueryInterface( IID_IConnectionPointContainer,
(void**)&spConnectionContainer );
if (SUCCEEDED(hr))
{
hr = spConnectionContainer->
FindConnectionPoint( __uuidof(_IWMPEvents),
&m_spConnectionPoint );
}
if (SUCCEEDED(hr))
{
hr = m_spConnectionPoint->Advise((IDispatch*)&m_WMPEvents,
&m_dwAdviseCookie );
}
else
{
AfxMessageBox(L"Failed to get WMP control events");
::PostQuitMessage(0);
return 0;
}
if ( FAILED(SetupWMP()) )
{
AfxMessageBox(L"Failed to setup WMP control");
::PostQuitMessage(0);
return 0;
}
}
m_spWMPPlayer->Stop();
return TRUE; // return TRUE unless you set the focus to a
// control
}
Conclusion
Download
Download the accompanying code's zip file here
References
Microsoft Windows Media Player 10 SDK
Microsoft Windows Media Player 8.x for Pocket PC
About the Author
Alex Gusev started to play with mainframes at the end of the 1980s, using Pascal and REXX, but soon switched to C/C++ and Java on different platforms. When mobile PDAs seriously rose their heads in the IT market, Alex did it too. Now, he works at an international retail software company as a team leader of the Mobile R department, making programmers' lives in the mobile jungles a little bit simpler.
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