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The WM_SHOWWINDOW message is sent to a window when the window is about to be hidden or shown.
Knock out "T" from CAN'T
You 'CAN' if you think you 'CAN'
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Not need hook WM_WINDOWPOSCHANGING (SetWindowPos)?
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Not sure why you are asking to hook anything but:
ShowWindow(hwnd, SW_HIDE)
John
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Isn't my window, and i don't know what time it show. 
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Ok then a hook is in order. You can use a WH_CALLWNDPROC hook but its operation depends on how much information you know about the window you are trying to hook. Usually you need to know the title of the window, but the name of the application may be all you need.
John
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Hi,
I have just discovered that it appears to be 10 times more complicated to deploy a VS 2005 app than one from VS 2003. 
Now the docs say I have to worry about manifests, shared assemblies, isolated assemblies, and private assemblies.
What is the simplest way to deploy an MFC 8.0 app ?? It doesn't need to share any dlls with any other app, it's not COM, and there is no managed code in it.
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If it's statically linked to the MFC libraries then you only have to distribute the exe. If it's dynamically linked to MFC then you have to distribute the MFC libraries with it.
Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
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return nCode<0 ? CallNextHookEx(hh,nCode,wParam,lParam):0;
thats the only line for GetMsgProc (WH_GETMESSAGE).
And it blocks language switching... neither ALT+SHIFT nor mouse switching
works
Why ????
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This is the general parrern I use for my hook procedures:
LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam)
{
LRESULT res = CallNextHookEx(g_hHook, nCode, wParam, lParam);
return res;
}</code>
You should always call the next hook in the hook chain unless you want to stop other hooks from processing the event - I suspect the language switching is implemented as a hook and you're not giving it a chance to process the event.
Steve
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I fixed it.
The problem was not in HOOKS
my dll had one SHARED section named ".hdata", i renamed it and now it works!
But why it did not work with ".hdata" ???
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I fixed it.
The problem was not in HOOKS
my dll had one SHARED section named ".hdata", i renamed it and now it works!
But why it did not work with ".hdata"
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I am developing a directshow filter to add effect to a song. I want to add the effect like this that at the beginning, the volume goes up gradually to normal, till the end, the volume decrease gradually to zero. I know the structure of the filter, but I am not familiar with audio control. Thanks for any information about implementation of the audio volume control.
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Hi there,
I am new in Socket programming and I need to develop a code to be able to connect to two different places and exchange information (send a packet to one location and gets back the answer and again sends that packet answers to two different locations through socket and one of these location is supposed to store information).
Could ay one guide me in this? I appreciate any ideas.
Regards,
Nahitan
nahitan
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TNX for the info
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TNx for the jnfo
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Hi I've got this code and I am trying to implement a thread with it.
Could someone tell me what are the sizes of the input and output buffer and their durations ? Are these parameters fixed or can be manipulated ?
What other parameters are being used in this code which can be manipulated ?
What is the rate at which samples are being played from output.
Code :
HRESULT __fastcall TDSFilter::InitDirectSound()
{
HRESULT hr;
DSBUFFERDESC dsbdesc;
// ZeroMemory( &aPosNotify, sizeof(DSBPOSITIONNOTIFY) * FNumBuffers);
dwOutputBufferSize = 0;
dwCaptureBufferSize = 0;
dwNotifySize = 0;
dwNextOutputOffset = 0;
// Initialize COM
if( FAILED( hr = CoInitialize(NULL) ) ) return DXTRACE_ERR_MSGBOX( TEXT("CoInitialize"), hr );
// Create IDirectSound using the preferred sound device
if( FAILED( hr = DirectSoundCreate8( NULL, &pDS, NULL ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("DirectSoundCreate"), hr );
// Set coop level to DSSCL_PRIORITY
if( FAILED( hr = pDS->SetCooperativeLevel( hWnd, DSSCL_PRIORITY ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("SetCooperativeLevel"), hr );
// Obtain primary buffer
ZeroMemory( &dsbdesc, sizeof(DSBUFFERDESC) );
dsbdesc.dwSize = sizeof(DSBUFFERDESC);
dsbdesc.dwFlags = DSBCAPS_PRIMARYBUFFER;
if( FAILED( hr = pDS->CreateSoundBuffer( &dsbdesc, &pDSBPrimary, NULL ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("CreateSoundBuffer"), hr );
// Create IDirectSoundCapture using the preferred capture device
if( FAILED( hr = DirectSoundCaptureCreate8( NULL, &pDSCapture, NULL ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("DirectSoundCaptureCreate"), hr );
return S_OK;
}
HRESULT __fastcall TDSFilter::FreeDirectSound()
{
// Release DirectSound interfaces
SAFE_RELEASE( pDSNotify );
SAFE_RELEASE( pDSBPrimary );
SAFE_RELEASE( pDSBOutput );
SAFE_RELEASE( pDSBCapture );
SAFE_RELEASE( pDSCapture );
SAFE_RELEASE( pDS );
// Release COM
CoUninitialize();
return S_OK;
}
HRESULT __fastcall TDSFilter::ScanAvailableOutputFormats()
{
WAVEFORMATEX wfx;
WAVEFORMATEX wfxSet;
HRESULT hr;
ZeroMemory( &wfxSet, sizeof(wfxSet) );
wfxSet.wFormatTag = WAVE_FORMAT_PCM;
ZeroMemory( &wfx, sizeof(wfx) );
wfx.wFormatTag = WAVE_FORMAT_PCM;
// Try 20 different standard format to see if they are supported
for( INT iIndex = 0; iIndex < 20; iIndex++ )
{
GetWaveFormatFromIndex( iIndex, &wfx );
// To test if a playback format is supported, try to set the format
// using a specific format. If it works then the format is
// supported, otherwise not.
if( FAILED( hr = pDSBPrimary->SetFormat( &wfx ) ) )
{
abOutputFormatSupported[ iIndex ] = FALSE;
}
else
{
// Get the format that was just set, and see if it
// is actually supported since SetFormat() sometimes returns DS_OK
// even if the format was not supported
if( FAILED( hr = pDSBPrimary->GetFormat( &wfxSet, sizeof(wfxSet),
NULL ) ) )
return DXTRACE_ERR_MSGBOX( TEXT("GetFormat"), hr );
if( memcmp( &wfx, &wfxSet, sizeof(wfx) ) == 0 )
abOutputFormatSupported[ iIndex ] = TRUE;
else
abOutputFormatSupported[ iIndex ] = FALSE;
}
}
return S_OK;
}
void __fastcall TDSFilter::GetWaveFormatFromIndex( INT nIndex, WAVEFORMATEX* pwfx )
{
INT iSampleRate = nIndex % 5;
INT iType = nIndex / 5;
switch( iSampleRate )
{
case 0: pwfx->nSamplesPerSec = 48000; break;
case 1: pwfx->nSamplesPerSec = 44100; break;
case 2: pwfx->nSamplesPerSec = 22050; break;
case 3: pwfx->nSamplesPerSec = 11025; break;
case 4: pwfx->nSamplesPerSec = 8000; break;
}
switch( iType )
{
case 0: pwfx->wBitsPerSample = 16; pwfx->nChannels = 2; break;
case 1: pwfx->wBitsPerSample = 16; pwfx->nChannels = 1; break;
case 2: pwfx->wBitsPerSample = 8; pwfx->nChannels = 2; break;
case 3: pwfx->wBitsPerSample = 8; pwfx->nChannels = 1; break;
}
pwfx->nBlockAlign = pwfx->nChannels * ( pwfx->wBitsPerSample / 8 );
pwfx->nAvgBytesPerSec = pwfx->nBlockAlign * pwfx->nSamplesPerSec;
}
void __fastcall TDSFilter::ConvertWaveFormatToString( WAVEFORMATEX* pwfx, TCHAR* strFormatName)
{
wsprintf( strFormatName,
TEXT("%u Hz, %u-bit %s"),
pwfx->nSamplesPerSec,
pwfx->wBitsPerSample,
( pwfx->nChannels == 1 ) ? TEXT("Mono") : TEXT("Stereo") );
}
HRESULT __fastcall TDSFilter::ScanAvailableInputFormats()
{
WAVEFORMATEX wfx;
DSCBUFFERDESC dscbd;
LPDIRECTSOUNDCAPTUREBUFFER pDSCaptureBuffer = NULL;
ZeroMemory( &wfx, sizeof(wfx) );
wfx.wFormatTag = WAVE_FORMAT_PCM;
ZeroMemory( &dscbd, sizeof(dscbd) );
dscbd.dwSize = sizeof(dscbd);
// Try 20 different standard format to see if they are supported
for( INT iIndex = 0; iIndex < 20; iIndex++ )
{
GetWaveFormatFromIndex( iIndex, &wfx );
// To test if a capture format is supported, try to create a
// new capture buffer using a specific format. If it works
// then the format is supported, otherwise not.
dscbd.dwBufferBytes = wfx.nAvgBytesPerSec;
dscbd.lpwfxFormat = &wfx;
if( FAILED( pDSCapture->CreateCaptureBuffer( &dscbd, &pDSCaptureBuffer, NULL ) ) ) abInputFormatSupported[ iIndex ] = FALSE;
else abInputFormatSupported[ iIndex ] = TRUE;
SAFE_RELEASE( pDSCaptureBuffer );
}
return S_OK;
}
HRESULT __fastcall TDSFilter::SetBufferFormats( WAVEFORMATEX* pwfxInput, WAVEFORMATEX* pwfxOutput )
{
HRESULT hr ;
// Set the format of the primary buffer
// to the format of the output buffer
if( FAILED( hr = pDSBPrimary->SetFormat( pwfxOutput ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("SetFormat"), hr );
// Set the notification size
dwNotifySize = FBufferSize ;
dwNotifySize -= dwNotifySize % pwfxInput->nBlockAlign;
// Set the buffer sizes
dwOutputBufferSize = FNumBuffers * dwNotifySize / 2;
dwCaptureBufferSize = dwNotifySize * FNumBuffers ;
SAFE_RELEASE( pDSBCapture );
// Create the capture buffer
DSCBUFFERDESC dscbd;
ZeroMemory( &dscbd, sizeof(dscbd) );
dscbd.dwSize = sizeof(dscbd);
dscbd.dwBufferBytes = dwCaptureBufferSize;
dscbd.lpwfxFormat = pwfxInput; // Set the format during creatation
if( FAILED( hr = pDSCapture->CreateCaptureBuffer( &dscbd, &pDSBCapture, NULL))) return DXTRACE_ERR_MSGBOX( TEXT("CreateCaptureBuffer"), hr );
return S_OK;
}
HRESULT __fastcall TDSFilter::CreateOutputBuffer()
{
HRESULT hr;
WAVEFORMATEX wfxInput;
// This sample works by creating notification events which
// are signaled when the capture buffer reachs specific offsets
// WinMain() waits for the associated event to be signaled, and
// when it is, it calls HandleNotifications() which copy the
// data from the capture buffer into the output buffer
ZeroMemory( &wfxInput, sizeof(wfxInput) );
pDSBCapture->GetFormat( &wfxInput, sizeof(wfxInput), NULL );
// Create the direct sound buffer using the same format as the
// capture buffer.
DSBUFFERDESC dsbd;
ZeroMemory( &dsbd, sizeof(DSBUFFERDESC) );
dsbd.dwSize = sizeof(DSBUFFERDESC);
dsbd.dwFlags = DSBCAPS_GLOBALFOCUS;
dsbd.dwBufferBytes = dwOutputBufferSize;
dsbd.guid3DAlgorithm = GUID_NULL;
dsbd.lpwfxFormat = &wfxInput;
// Create the DirectSound buffer
if( FAILED( hr = pDS->CreateSoundBuffer( &dsbd, &pDSBOutput, NULL ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("CreateSoundBuffer"), hr );
// Create a notification event, for when the sound stops playing
if( FAILED( hr = pDSBCapture->QueryInterface( IID_IDirectSoundNotify, (VOID**)&pDSNotify ) ) )
return DXTRACE_ERR_MSGBOX( TEXT("QueryInterface"), hr );
// Setup the notification positions
for( unsigned int i = 0; i < FNumBuffers ; i++ ) {
aPosNotify[i].dwOffset = (dwNotifySize * i) + dwNotifySize - 1;
aPosNotify[i].hEventNotify = hNotificationEvent;
}
// Tell DirectSound when to notify us. the notification will come in the from
// of signaled events that are handled in WinMain()
if( FAILED( hr = pDSNotify->SetNotificationPositions( FNumBuffers, aPosNotify ) ) )
return DXTRACE_ERR_MSGBOX( TEXT("SetNotificationPositions"), hr );
return S_OK;
}
HRESULT __fastcall TDSFilter::StartBuffers()
{
WAVEFORMATEX wfxOutput;
VOID* pDSLockedBuffer = NULL;
DWORD dwDSLockedBufferSize;
HRESULT hr;
// Restore lost buffers
if( FAILED( hr = RestoreBuffer( pDSBOutput, NULL ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("RestoreBuffer"), hr );
// Reset the buffers
dwNextOutputOffset = 0;
pDSBOutput->SetCurrentPosition( 0 );
// Find out where the capture buffer is right now, then write data
// some extra amount forward to make sure we're ahead of the write cursor
pDSBCapture->GetCurrentPosition( &dwNextCaptureOffset, NULL );
dwNextCaptureOffset -= dwNextCaptureOffset % dwNotifySize;
dwNextOutputOffset = dwNextCaptureOffset + ( dwNotifySize << 1);
dwNextOutputOffset %= dwOutputBufferSize; // Circular buffer
// Tell the capture buffer to start recording
pDSBCapture->Start( DSCBSTART_LOOPING );
// Rewind the output buffer, fill it with silence, and play it
pDSBOutput->SetCurrentPosition( dwNextOutputOffset );
// Save the format of the capture buffer in g_pCaptureWaveFormat
ZeroMemory( &wfxCaptureWaveFormat, sizeof(WAVEFORMATEX) );
pDSBCapture->GetFormat( &wfxCaptureWaveFormat, sizeof(WAVEFORMATEX), NULL );
// Get the format of the output buffer
ZeroMemory( &wfxOutput, sizeof(wfxOutput) );
pDSBOutput->GetFormat( &wfxOutput, sizeof(wfxOutput), NULL );
// Fill the output buffer with silence at first
// As capture data arrives, HandleNotifications() will fill
// the output buffer with wave data.
if( FAILED( hr = pDSBOutput->Lock( 0, dwOutputBufferSize, &pDSLockedBuffer, &dwDSLockedBufferSize, NULL, NULL, 0)))
return DXTRACE_ERR_MSGBOX( TEXT("Lock"), hr );
FillMemory( (BYTE*) pDSLockedBuffer, dwDSLockedBufferSize,
(BYTE)( wfxOutput.wBitsPerSample == 8 ? 128 : 0 ) );
pDSBOutput->Unlock( pDSLockedBuffer, dwDSLockedBufferSize, NULL, NULL );
// Play the output buffer
pDSBOutput->Play( 0, 0, DSBPLAY_LOOPING );
return S_OK;
}
HRESULT __fastcall TDSFilter::RestoreBuffer( LPDIRECTSOUNDBUFFER pDSBuffer, BOOL* pbRestored )
{
HRESULT hr;
if( pbRestored) *pbRestored = FALSE;
if( !pDSBuffer ) return S_FALSE;
DWORD dwStatus;
if( FAILED( hr = pDSBuffer->GetStatus( &dwStatus ) ) ) return DXTRACE_ERR_MSGBOX( TEXT("GetStatus"), hr );
if( dwStatus & DSBSTATUS_BUFFERLOST ) {
// Since the app could have just been activated, then
// DirectSound may not be giving us control yet, so
// the restoring the buffer may fail.
// If it does, sleep until DirectSound gives us control.
do {
hr = pDSBuffer->Restore();
if( hr == DSERR_BUFFERLOST )
Sleep( 10 );
} while( ( hr = pDSBuffer->Restore() ) == DSERR_BUFFERLOST );
if( pbRestored) *pbRestored = TRUE;
return S_OK;
} else return S_FALSE;
}
HRESULT __fastcall TDSFilter::HandleNotification()
{
HRESULT hr;
VOID* pDSCaptureLockedBuffer = NULL;
VOID* pDSOutputLockedBuffer = NULL;
DWORD dwDSCaptureLockedBufferSize;
DWORD dwDSOutputLockedBufferSize;
DWORD dwStatus;
// Make sure buffers were not lost, if the were we need
// to start the capture again
if( FAILED( hr = pDSBOutput->GetStatus( &dwStatus))) return DXTRACE_ERR_MSGBOX( TEXT("GetStatus"), hr );
if( dwStatus & DSBSTATUS_BUFFERLOST ) {
if( FAILED( hr = StartBuffers())) return DXTRACE_ERR_MSGBOX( TEXT("StartBuffers"), hr );
return S_OK;
}
// Lock the capture buffer down
if( FAILED( hr = pDSBCapture->Lock( dwNextCaptureOffset, dwNotifySize, &pDSCaptureLockedBuffer,
&dwDSCaptureLockedBufferSize, NULL, NULL, 0L)))
return DXTRACE_ERR_MSGBOX( TEXT("Lock"), hr );
// Lock the output buffer down
if( FAILED( hr = pDSBOutput->Lock( dwNextOutputOffset, dwNotifySize, &pDSOutputLockedBuffer,
&dwDSOutputLockedBufferSize, NULL, NULL, 0L)))
return DXTRACE_ERR_MSGBOX( TEXT("Lock"), hr );
// These should be equal
if( dwDSOutputLockedBufferSize != dwDSCaptureLockedBufferSize ) return E_FAIL; // Sanity check unhandled case
// Just copy the memory from the
// capture buffer to the playback buffer
Process( (short*) pDSCaptureLockedBuffer, dwDSOutputLockedBufferSize) ;
CopyMemory( pDSOutputLockedBuffer, pDSCaptureLockedBuffer, dwDSOutputLockedBufferSize );
// Unlock the play buffer
pDSBOutput->Unlock( pDSOutputLockedBuffer, dwDSOutputLockedBufferSize, NULL, 0 );
// Unlock the capture buffer
pDSBCapture->Unlock( pDSCaptureLockedBuffer, dwDSCaptureLockedBufferSize, NULL, 0 );
// Move the capture offset along
dwNextCaptureOffset += dwDSCaptureLockedBufferSize;
dwNextCaptureOffset %= dwCaptureBufferSize; // Circular buffer
// Move the playback offset along
dwNextOutputOffset += dwDSOutputLockedBufferSize;
dwNextOutputOffset %= dwOutputBufferSize; // Circular buffer
return S_OK;
}
I would really appreciate your help.
Thanks
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student_eng wrote: Could someone tell me what are the sizes of the input and output buffer...
Without needlessly looking though hundreds of lines of code, what buffers are you referring to?
In the future, post just the relevant code and you'll stand a better chance of receiving help.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Hi,
I have a problem while using a CToolTipCtrl in a modeless dialog. I have created the tooltip the standard way:
BOOL CMyDlg::OnInitDialog()
{
m_pTip = new CToolTipCtrl();
m_pTip->Create(this, TTS_ALWAYSTIP);
m_pTip->SetMaxTipWidth(250);
m_pTip->AddTool(GetDlgItem(IDC_SOMETHING), "Something");
m_pTip->Activate(TRUE);
}
BOOL CMyDlg::PreTranslateMessage(MSG* pMsg)
{
if(m_pTip != NULL)
m_pTip->RelayEvent(&msg);
}
If I create the dialog modeless the tooltip isn't shown. If I create the dialog modal it works fine!
Can someone help me please?
mADmAX0001
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madmax0001 wrote: Can someone help me please?
Does this help?
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Hi,
thank you for your reply. Unfortunatelly it doesn't work. I think it is because the dialog resource is within a DLL.
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Hi madmax0001,
maybe it is some helpful to you
////h File/////////////////
void SetToolTip(LPCTSTR lpszText);
CToolTipCtrl m_tooltip;
////h File/////////////////
BOOL CAnswerView::OnInitDialog()
{
m_tooltip.Create(this);
SetToolTip("Hello");
}
void CAnswerView::SetToolTip(LPCTSTR lpszText)
{
TOOLINFO ti;
ti.cbSize = sizeof(TOOLINFO);
ti.lpszText = (LPTSTR)lpszText;
ti.hinst = AfxGetInstanceHandle();
ti.hwnd = m_Button.m_hWnd;//GetDlgItem(IDC_BUTTON1)->m_hWnd;
ti.uFlags = TTF_SUBCLASS | TTF_IDISHWND;
ti.uId = (UINT) m_Button.m_hWnd;//GetDlgItem(IDC_BUTTON1)->m_hWnd;
m_tooltip.SendMessage(TTM_ADDTOOL, 0, (LPARAM) &ti);
}
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Hi,
thank you! This works ! Even if the dialog resource is within a DLL.
Thank you very much !
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